Corsi Collection of Decorative Stones

Page 8 of 10, showing 701 - 800 of 1000 stones.
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OUMNH number Name and quarry location Geological description
OUMNH number Name and quarry location Geological description
642stone 642 Pietra del Vesuvio, from Mt. Vesuvius, Naples, Campania, Italy Ignimbrite. A devitrified welded rock containing megacrysts of simple and lamellar-twinned feldspars, smaller crystals of ferromagnesian minerals, and fine-grained rounded clasts. The compression of the shards is evident in the side of the specimen.
643stone 643 Pietra del Vesuvio, from Mt. Vesuvius, Naples, Campania, Italy Ignimbrite. A devitrified welded rock containing megacrysts of simple and lamellar-twinned feldspars, smaller crystals of ferromagnesian minerals, and fine-grained rounded clasts. The compression of the shards is evident in the side of the specimen.
644stone 644 Pietra del Vesuvio, from Mt. Vesuvius, Naples, Campania, Italy Olivine basalt/ankaramite. An altered porphyritic basic volcanic/dyke rock with phenocrysts of subhedral to euhedral pyroxene, olivine, and plagioclase. Calcite fills the amygdales.
645stone 645 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Altered pumice breccia. Poorly sorted, with clasts up to 50mm, having rounded, carbonate-infilled vesicles.
646stone 646 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Altered volcanic breccia with a central pale grey fine-grained zone. The large rounded clasts are ferromagnesian-rich volcanic rock, one having a higher feldspar content. The fine-grained zone has a medium-grained leucocratic carbonate-rich core.
647stone 647 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Marble breccia. A low-density breccia with angular clasts of meta-carbonate, and hematite-filled veins. Much of the brown is filler.
648stone 648 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Ignimbrite. A poorly sorted breccia with clasts of rusty-coloured medium grained crystalline rock, discrete crystals of altered feldspar, and ferromagnesian minerals, all in a very fine-grained hematite-bearing groundmass. There is a faint preferred orientation of the clasts.
649stone 649 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Trachyandesite/trachyte. A pale grey porphyritic vocanic or dyke rock with subhedral laths of feldspar showing some alignment, set in a groundmass of feldspar and minor ferromagnesian minerals.
650stone 650 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy An altered crystal-rich ignimbrite. Amygdaloidal microporphyritic rock clasts with altered subhedral phenocrysts of a ferromagnesian mineral and feldspar, are set in very fine-grained dark matrix. Amygdales are rounded or irregular in shape, and many contain carbonate infills which have a banded agate-like appearance. The streaky appearance of paler patches suggests a flattened shard structure.
651stone 651 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy An altered pumice flow breccia. Coarse breccia with clasts of red vesicular rock in pale carbonate matrix. The vesicles are carbonate-filled.
652stone 652 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy An altered ignimbrite. A poorly sorted breccia with clasts of rusty-brown medium-grained crystalline rock, discrete crystals of altered feldspar, and ferromagnesian minerals, all in a very fine-grained hematite-bearing groundmass. A faint preferred orientation of the clasts is evident.
653stone 653 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy An intermediate volcanic rock with abundant phenocrysts of feldspar and sparse pyroxene crystals set in very fine grained grey matrix. The feldspars are strongly aligned. They are probably plagioclase, and so the rock may be a porphyritic andesite.
654stone 654 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy An altered pumiceous tuff. Brick-red, carbonate-bearing medium to fine-grained, well-sorted rock with a few larger subangular pumice clasts. No. 656 may be this rock in an unaltered state.
655stone 655 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Olivine basalt/trachybasalt. Dark grey porphyritic lava with phenocrysts of plagioclase, olivine and pyroxene (all variably altered) in a fine-grained equigranular matrix. Rounded vesicles have zoned infills of hematite and calcite.
656stone 656 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Tuff. Moderately sorted coarse-grained dark crystal-rich ash with rounded grains of plagioclase, pyroxene, olivine, and rarer grains of an opaque oxide mineral. It has an overall basaltic composition, and may be the unaltered equivalent of no. 654.
657stone 657 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Ignimbrite. A streaky-textured volcaniclastic rock containing carbonate minerals. It has crystals and crystal clusters of feldspar, pyroxene, opaque mineral, and possibly altered olivine. Half of the specimen has a faint shard structure and possibly some flattened pumice clasts.
658stone 658 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Basaltic crystal tuff. A dark grey compact well-sorted rock comprising principally plagioclase with minor subhedral crystals of dark green pyroxene and rare partially altered olivine.
659stone 659 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Volcanic breccia with sub-angular clasts of altered fine-grained basic rock and some of vesicular rock. Vesicles have carbonate infills, and some are surrounded by reaction rims which perhaps indicates magma mixing. The streaky texture suggests some plastic deformation.
660stone 660 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Tuff or basic lava. A dull red, equigranular rock composed principally of pale pink stained feldspar set in very fine dark matrix, with occasional pyroxenes up to 10mm. It has amygdales containing zoned carbonate and red oxide.
661stone 661 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy A porphyritic trachyte, consisting of rounded or stubby white feldspars, glassy laths of plagioclase showing alignment, and subhedral elongate crystals of pyroxene.
662stone 662 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Mixed rock, possibly from a junction of intermediate and basic magmas. Patches of paler grey microporphyritic rock consisting of feldspars and sub-aligned euhedral pyroxene crystals. These have diffusion rims (containing carbonate) at contacts with the dark streaky-textured coarser rock, which contains larger crystals of feldspar and pyroxene.
663stone 663 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Tephrite. A porphyritic rock with euhedral white megacrysts of leucite and subhedral dark green megacrysts of alkali pyroxene, in a very fine-grained groundmass of feldspar and ?feldspathoid set in pale brown matrix. A few yellow ?olivines are visible.
664stone 664 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Altered (?phonolitic) tephrite. A porphyritic rock with prominent euhedral megacrysts of black pyroxene, and with an altered euhedral pale mineral forming less obvious phenocrysts. The groundmass is very fine-grained, fawn-coloured, and of indeterminate mineralogy. This sample has some similarities with no. 665 but is lighter in colour, possibly because of alteration.
665stone 665 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Altered (?phonolitic) tephrite. It is brecciated, but similar in mineralogy to no. 664. Prominent black pyroxenes occur within and separated from the clasts. These also contain a strongly altered felsic mineral. The matrix is white carbonate, but the lack of rounding of pyroxenes suggests that it has infiltrated the rock, and not entered as a result of fracturing and movement.
666stone 666 Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy Altered (?phonolitic) tephrite. A porphyritic rock with carbonate-replaced feldspathoid crystals. Smaller subhedral crystals after pyroxene speckle the groundmass, which is rich in white carbonate and pink felsic material.
881stone 881 Pietra di Malanaggio, from Malanaggio, Val Chisone, Piedmont, Italy Grey medium-grained foliated meta-granodiorite with aligned brownish altered amphibole.
886stone 886 Pietra di Malanaggio, from Malanaggio, Val Chisone, Piedmont, Italy A foliated, recrystallised medium-grained meta-granodiorite.
671stone 671 Pietra di paragone, Lydian stone, locality unknown Ignimbrite. This fine-grained rock with a streaky texture has occasional crystals of feldspar and a ferromagnesian mineral. It is densely welded.
522stone 522 Pietra felce dell'Elba, pietra paesina, from the island of Elba, Livorno, Tuscany, Micritic limestone or calcareous marl showing minor fracture constrained iron-staining giving faint paesina effect. It has abundant areas of dendritic manganese oxides.
508stone 508 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Micritic limestone or calcareous marl from the Cretaceous-Eocene Alberese Formation. Calcite-filled microfractures control iron-staining. Some dendritic manganese oxides emanate from the fractures.
528stone 528 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Micritic limestone or calcareous marl from the Cretaceous-Eocene Alberese Formation. Calcite-filled microfractures control iron-staining, giving the 'paesina' effect. Minor dendritic manganese oxides emanate from the fractures.
533stone 533 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Micritic limestone or calcareous marl from the Cretaceous-Eocene Alberese Formation. Liesegang rings of iron-staining colour the specimen.
534stone 534 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Micritic limestone or calcareous marl from the Cretaceous-Eocene Alberese Formation. Brown ferruginous calcite or siderite-filled veins cut the specimen and there is some pink coloration constrained by calcite-filled microfractures giving a faint 'paesina' effect.
958stone 958 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Heavily fractured micritic limestone with abundant tiny bioclasts, stylolites and orange and white sparry calcite-filled fractures. Ferruginous staining is constrained by sealed microfractures giving the 'paesina' effect. There are minor dendrites of manganese oxides. It is almost certainly from the Cretaceous to Eocene Alberese Formation.
959stone 959 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Heavily fractured micritic limestone with sparry calcite-filled fractures and stylolites. Ferruginous staining is constrained by the fractures giving the 'paesina' effect. It is almost certainly from the Cretaceous to Eocene Alberese Formation.
960stone 960 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Heavily fractured micritic limestone with sparry calcite-filled fractures. Ferruginous staining is constrained by the fractures and shows banded Liesegang rings, together giving the 'paesina' effect. It is almost certainly from the Cretaceous to Eocene Alberese Formation.
510stone 510 Pietra paesina, from Florence, Tuscany, Italy; and most probably from the Valdarno Calcareous marl/marly limestone from the Upper Cretaceous Alberese Formation. Calcite-filled microfractures control extent of iron/manganese colouration. Note the prominent stylolites.
507stone 507 Pietra paesina, from Florence, Tuscany, Italy; and most probably from Valdarno Micritic limestone or calcareous marl from the Cretaceous Alberese Formation, with red hematitic specks and stylolites. Calcite-filled microfractures control iron-staining. Some dendritic Mn oxides emanate from the fractures.
519stone 519 Pietra paesina, from the province of Naples, Campania, Italy Micritic limestone or calcareous marl. Calcite-filled microfractures control iron-staining which together with Liesegang rings of colour, gives the 'paesina' effect. Some dendritic manganese oxides are evident.
957stone 957 Pietra paesina, from Trent, Trentino-Alto Adige, Italy Heavily fractured micritic limestone with abundant tiny bioclasts. Ferruginous staining shows typical Liesegang rings, and is constrained by sealed microfractures giving the 'paesina' effect seen best on sides of sample. Dendritic manganese oxides emanate from fractures. It is almost certainly from the Cretaceous to Eocene Alberese Formation.
956stone 956 Pietra paesina, from Tuscany, Italy Micritic limestone with scattered tiny bioclasts, coarser-grained intraclasts, and stylolites. It is heavily fractured, the microfracture-constrained iron-staining giving a 'paesina' effect. Abundant dentritic manganese oxides are concentrated in, or emanate from some intraclasts, stylolites and veins. It is almost certainly from the Cretaceous to Eocene Alberese Formation.
523stone 523 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation, showing minor fracture constrained iron-staining, and areas of dendritic manganese oxides.
529stone 529 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation. Calcite-filled microfractures control iron-staining. Some dendritic Mn oxides emanate from the fractures.
530stone 530 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation. Calcite-filled microfractures control iron-staining. Some dendritic Mn oxides emanate from the fractures.
531stone 531 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation. Calcite-filled microfractures control iron-staining. It is cut by a large calcite-filled vein.
532stone 532 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation. It is heavily iron-stained, the coloration constrained by abundant calcite-filled microfractures. Manganese oxide dendrite are also abundant.
941stone 941 Pietra perlea di Trento, from Trent, Trentino-Alto Adige, Italy Massive coarsely crystalline calcite with iridescence off incipient cleavages. Reddish brown in places, ferruginous matter coating some incipient cleavage planes.
257stone 257 Pietra Rosone di Trapani, from Trapani, Sicily, Italy Limestone. The matrix is fine-grained microspar crowded with bioclasts of benthic forams, molluscs, bryozoans, echinoderms, calcareous algae etc. It contains abundant silicate grains, as well as larger fossils and calcareous algae.
553stone 553 Pietra rota degli Appennini, from the Apennines, Italy Quartzite with limonitic cement.
458stone 458 Pomarolo di Serme, from Serme, Verona, Veneto, Italy Brecciated limestone with red, non-calcareous (perhaps lateritic) matrix.
430stone 430 Pomorol di S.Giorgio, from San Giorgio, Verona, Veneto, Italy Brecciated, stylolitised, biomicrite limestone with scattered intraclasts.
43stone 43 Pomorolo di Mizzolle, from Mizolle, Val Pantena, Verona, Veneto, Italy Brecciated fine-grained limestone crowded with rhombohedral microcrystals of calcite. It has prominent stylolites. Dark brown areas are wax filler.
794stone 794 Porfido del'Elba, from the island of Elba, Livorno, Tuscany, Italy Porphyritic andesite or trachyandesite. Subhedral phenocrysts of plagioclase and pyroxene in fine-grained reddish-brown groundmass, possibly devitrified glass. Curved alignment of crystals indicates viscous flow.
811stone 811 Porfido delle Alpi, from the Alps Porphyry with large phenocrysts of white plagioclase feldspar.
983stone 983 Porfido delle Alpi, from the Alps Quartz porphyry. Pale reddish brown rock. Subhedral phenocrysts of glassy quartz up to 3mm and pale brown alkali feldspar set in very fine-grained pale brown groundmass with occasional ferromagnesian silicate mineral and black oxide.
984stone 984 Porfido delle Alpi, from the Alps Quartz porphyry. Greyish brown colour. Prominent white subhedral feldspar phenocrysts, some showing compositional zoning with lamellar-twinned interiors and untwined rims. Rounded glassy quartz phenocrysts and prismatic dark brown ferromagnesian mineral, probably amphibole. All set in very fine-grained pale brown groundmass. Similar in mineralogy to 0983, but with different proportions of feldspar and quartz phenocrysts.
812stone 812 Porfido delle Alpi, from the Alps; or perhaps from the island of Elba, Livorno, Tuscany, Italy A microgabbro with a gabbro pegmatite containing large phenocrysts of white plagioclase feldspar. Altered, the pyroxene crystals are probably 'uralitised' to amphibole.
810stone 810 Porfido di Cecina, from Cecina, Livorno, Tuscany, Italy Porphyritic andesite. Subhedral phenocrysts up to 20mm of zoned plagioclase in dark grey groundmass of plagioclase, pyroxene and ?amphibole. Minor micaceous veining.
791stone 791 Porfido di Corsica, from Corsica, France Altered amygdaloidal porphyritic olivine basalt. Pseudomorphed euhedral phenocrysts of olivine and subhedral pyroxene are set in a dark grey fine-grained groundmass of pyroxene, olivine and feldspar. Olivine pseudomorphs contain dark oxide and carbonate. Amygdales have infillings of carbonate and silicate minerals, and many have reaction zones against groundmass in which the latter is lighter-coloured and coarser-grained.
152stone 152 Porfido di Sardegna, from Sardinia, Italy Calcite marble with scattered large crystals of calcite in a fine-grained groundmass coloured grey by minute grains of ?graphite. Any brown coloration is polishing compound filling cavities where the large grains have fallen out.
985stone 985 Porfido di Siberia, from Siberia, Russia Plagiophyric micro-diorite. Laths of white plagioclase, frequently in clusters, and dark green subhedral amphibole set in fine-grained matrix of probably similar mineralogy.
806stone 806 Porfido serpentino antico, porfido verde agatata, from Krokees (Levetsova), Laconia, Peloponnese, Greece Porphyritic andesite of Permian to Carboniferous age, weakly metamorphosed and coloured green by epidote and other iron silicates. The phenocrysts are plagioclase feldspar, and vesicles are filled with cryptocrystalline quartz (chalcedony).
802stone 802 Porfido serpentino antico, porfido verde risato, from Krokees (Levetsova), Laconia, Peloponnese, Greece Porphyritic andesite of Permian to Carboniferous age, weakly metamorphosed and coloured green by epidote and other iron silicates. It has small phenocrysts of plagioclase feldspar.
805stone 805 Porfido serpentino antico, porfido Vitelli, from Krokees (Levetsova), Laconia, Peloponnese, Greece Porphyritic andesite of Permian to Carboniferous age, weakly metamorphosed and coloured green by epidote and other iron silicates. The phenocrysts are plagioclase feldspar.
797stone 797 Porfido serpentino antico, from Krokees (Levetsova), Laconia, Peloponnese, Greece Porphyritic andesite of Permian to Carboniferous age, weakly metamorphosed and coloured green by epidote and other iron silicates. The phenocrysts are plagioclase feldspar.
798stone 798 Porfido serpentino antico, from Krokees (Levetsova), Laconia, Peloponnese, Greece Porphyritic andesite of Permian to Carboniferous age, weakly metamorphosed and coloured green by epidote and other iron silicates. The phenocrysts are plagioclase feldspar.
799stone 799 Porfido serpentino antico, from Krokees (Levetsova), Laconia, Peloponnese, Greece Porphyritic andesite of Permian to Carboniferous age, weakly metamorphosed and coloured green by epidote and other iron silicates. The phenocrysts are plagioclase feldspar.
800stone 800 Porfido serpentino antico, from Krokees (Levetsova), Laconia, Peloponnese, Greece Porphyritic andesite of Permian to Carboniferous age, weakly metamorphosed and coloured green by epidote and other iron silicates. The phenocrysts are plagioclase feldspar.
801stone 801 Porfido serpentino antico, from Krokees (Levetsova), Laconia, Peloponnese, Greece Porphyritic andesite of Permian to Carboniferous age, weakly metamorphosed and coloured green by epidote and other iron silicates. The phenocrysts are plagioclase feldspar.
803stone 803 Porfido serpentino antico, from Krokees (Levetsova), Laconia, Peloponnese, Greece Porphyritic andesite of Permian to Carboniferous age, weakly metamorphosed and coloured green by epidote and other iron silicates. The phenocrysts are plagioclase feldspar.
804stone 804 Porfido serpentino antico, from Krokees (Levetsova), Laconia, Peloponnese, Greece Porphyritic andesite of Permian to Carboniferous age, weakly metamorphosed and coloured green by epidote and other iron silicates. The phenocrysts are plagioclase feldspar.
967stone 967 Porfido serpentino antico, from Krokees (Levetsova), Laconia, Peloponnese, Greece Deformed porphyritic microdiorite (plagioclase-biotite?), feldspar replaced by aggregates of epidote. There is primary sub-parallel orientation of the porphyroblasts of replaced feldspars.
809stone 809 Porfido serpentino nero, from Wadi Umm Towat, near Gebel Dokhan, Eastern Desert, Egypt Trachyandesite porphyry with white phenocrysts of plagioclase feldspar.
790stone 790 Porfido Trentino, porfido Atesino, from Bolzano area, Trentino-Alto Adige, Italy Pophyritic rhyolite with phenocrysts of quartz, feldspar and biotite.
63stone 63 Porporina di villa Adriana, locality unknown Hematite-rich banded limestone with some colourless sparry calcite-filled veins, and abundant cavities which are filled with wax on polished surfaces. Probably extensively recrystallised.
77stone 77 Portasanta, from north west of Chora, Island of Chíos, North Aegean, Greece Large clasts of pale pink compact fine-grained limestone showing a reticulated network of stylolites. It is part of a breccia, and small areas of salmon-pink micritic matrix can be seen.
78stone 78 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece Fine-grained compact limestone breccia. Heavily fractured, the later fractures are filled with white calcite. Some mollusc shell fragments are present.
79stone 79 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece Fine-grained compact limestone, partially recrystallised. Abundant stylolites containing red iron oxides give a reticulated (net-like) appearance.
80stone 80 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece Partially recrystallised fine-grained compact limestone. Red and yellow iron oxides are concentrated in abundant stylolites, giving a reticulated (net-like) appearance.
81stone 81 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece Fine-grained compact limestone, partially recrystallised, with abundant stylolites.
82stone 82 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece A breccia of pink micritic limestone clasts with intraclasts of a pink/grey breccia. A little dark red-brown hematitic matrix is visible in a few places. Abundant stylolites cross the stone and later fractures are filled with white calcite. White lines are scratches.
84stone 84 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece Breccia of poorly-sorted fine-grained pink and cream-coloured limestone clasts in a dark red hematite-bearing micritic matrix. The limestone clasts have a few bioclasts and stylolites. Late stage white calcite-filled fractures cross the specimen.
87stone 87 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece Limestone breccia. The clasts are pink micritic limestone with pink/grey intraclasts. The matrix is dark red-brown, hematitic. Abundant stylolites cross the stone and later fractures are filled with white calcite.
88stone 88 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece White limestone with relics of bioclasts, spar filled veins and a few yellowish iron oxide-stained veins and stylolites. It is likely to be part of a large clast from a breccia.
193stone 193 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece Fine-grained compact limestone breccia with stylolites and stylolitic clast boundaries. Some relic shell fragments are evident. Fractures are filled with white calcite.
904stone 904 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece Fine-grained compact limestone, partially recrystallised, with red iron oxides concentrated in abundant stylolites giving a characteristic reticulated appearance often seen in this stone.
905stone 905 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece Fine-grained compact limestone breccia of pink clasts. There are abundant stylolites, and later fractures are filled with white calcite.
906stone 906 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece Partially recrystallised bioclastic limestone with crinoid and other debris, stylolites, and spar-filled fractures.
908stone 908 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece Fine-grained recrystallised limestone with stylolites and spar-filled fractures.
133stone 133 Portoro, from Portovenere, Liguria, Italy Black fine-grained weakly metamorphosed limestone with thin white calcite-filled veins, and with stylolites, sinuous wider veins and pods of calcite coloured yellow by included goethite.
134stone 134 Portoro, from Portovenere, Liguria, Italy Breccia of black fine-grained weakly metamorphosed limestone with thin white calcite-filled veins, in a matrix of granular calcite coloured yellow by included goethite. Yellow stylolites are also prominent.
135stone 135 Portoro, from Portovenere, Liguria, Italy Black fine-grained weakly metamorphosed limestone with thin white calcite-filled veins, and with stylolites, and a few sinuous wider veins of calcite coloured yellow by included goethite.
681stone 681 Pudingo antico, locality unknown Poorly sorted synsedimentary breccia/conglomerate. Red clasts are chert, containing igneous grains.
682stone 682 Pudingo antico, locality unknown Polymict conglomerate with clasts of quartz, chert, silicified limestone, and dolomitic limestone. The matrix is calcareous.
698stone 698 Pudingo delle Alpi, from the Alps Well-sorted quartz conglomerate with subsidiary lithic clasts.
699stone 699 Pudingo delle Alpi, from the Alps Lithic breccia-conglomerate with siliceous clasts.
972stone 972 Pudingo delle Alpi, from the Alps Polymict conglomerate with sandstone matrix, clasts: limestone, marble? rock. Fragments possibly volcanic? Some chalcedony. Scattered bivalves and gastropods in the matrix - ?marine
970stone 970 Pudingo di Sabina, from Sabina, Umbria, Italy Polymict conglomerate. Clasts predominantly limestone, but include some silicates including muscovite; a few clasts are pebbles of igneous/metamorphic rocks (granite/gneiss etc.). Matrix is calcarenite with some quartz, coated with yellowish goethite.
971stone 971 Pudingo di Toscana, from Tuscany, Italy Polymict breccio-conglomerate, clasts are largely quartz or chert, and some have inclusions of pyrite. Matrix is calcarenite.
707stone 707 Quartz chalcedony or more probably flint, locality unknown Quartz var. chalcedony, coloured by included iron silicates.
Page 8 of 10, showing 701 - 800 of 1000 stones.
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