Corsi Collection of Decorative Stones

Page 3 of 4, showing 201 - 300 of 326 stones.
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OUMNH number Name and quarry location Geological description
OUMNH number Name and quarry location Geological description
24stone 24 Giallo antico, from Chemtou, Tunisia Fine-grained limestone, extensively recrystallised through diagenesis but showing relics of a peloidal structure. It has slender ferruginous veins and small black manganese oxide dendrites. The sides of the specimen show that it is brecciated and cemented by a white sparry calcite matrix.
28stone 28 Giallo antico, from Chemtou, Tunisia Breccia of clasts of fine-grained limestone, extensively recrystallised through diagenesis, in a ferruginous micritic matrix. Note areas of coarser crystalline calcite (probably the relics of fossils), and stylolites.
30stone 30 Giallo antico, from Chemtou, Tunisia Breccia of clasts of fine-grained limestone, extensively recrystallised through diagenesis, in a ferruginous micritic matrix.
31stone 31 Giallo antico, from Chemtou, Tunisia Breccia of clasts of fine-grained limestone, extensively recrystallised through diagenesis, in a ferruginous micritic matrix.
32stone 32 Giallo antico, from Chemtou, Tunisia Breccia of clasts of fine-grained limestone, extensively recrystallised through diagenesis, in a ferruginous micritic matrix. Note areas of coarser crystalline calcite (probably the relics of fossils).
33stone 33 Giallo antico, from Chemtou, Tunisia Breccia of clasts of fine-grained limestone, extensively recrystallised through diagenesis, in a ferruginous micritic matrix. Note areas of coarser crystalline calcite (probably the relics of fossils), and minor dendrites of manganese oxides.
34stone 34 Giallo antico, from Chemtou, Tunisia Breccia of clasts of fine-grained limestone, extensively recrystallised through diagenesis, in a ferruginous micritic matrix. It has been cut to show where the matrix has turned grey as a result of exposure to anoxic reducing conditions. Other parts of this specimen are the normal colour of a giallo antico.
41stone 41 Giallo di Verona, Verona yellow, from Torbe, or more probably Torri del Benaco, Verona, Veneto, Italy Brecciated fossiliferous biomicrite limestone crowded with large and small bioclasts.
125stone 125 Grand antique, bianco e nero antico, from Lez valley, Aubert, near St Girons, Hautes-Pyrénées, France Breccia of almost black limestone clasts in a compact white granular calcite matrix.
128stone 128 Grand antique, bianco e nero antico, from Lez valley, Aubert, near St Girons, Hautes-Pyrénées, France Breccia of grey limestone clasts in a compact white granular calcite matrix.
418stone 418 Grand antique, bianco e nero antico, from Lez valley, Aubert, near St Girons, Hautes-Pyrénées, France Black limestone breccia with calcite-filled voids and fractures. Some beige coloured areas are fossiliferous clasts and margins to black clasts.
875stone 875 Granito delle Alpi, from the Alps; or perhaps breccia d'Armenia, from the historical region of Armenia Coarse hornblende quartz monzonite with pale green-stained (chloritic?) plagioclase and accessory apatite. Specimen shows faint foliation.
1000stone 1000 Granito delle Alpi, from the Alps; or perhaps from Elba, Livorno, Tuscany, Italy Breccia of calcite marble, limestone, serpentine, and metagabbro clasts, with a single large metagabbro clast forming the greater part of the specimen.
407stone 407 Griotte, from the Haute Pyrénées, France Lower Devonian red nodular limestone, clay-rich matrix, with extensive solution seams and stylolites
457stone 457 Griotte, from the Haute Pyrénées, France Devonian hematite-rich fine-grained nodular limestone with extensive stylolite development. White areas are calcite spar-filled goniatites
719stone 719 Jasper, locality unknown This appears to be a largely silicified oolitic ironstone or oolitic ironstone breccia. Swarms of sub-parallel dark brown fractures give the impression of wood grain.
208stone 208 Languedoc marble, from Caunes-Minervois, Carcassonne, Aude, France Devonian red limestone rich in crinoid debris, with prominent grey-white stromatactis and abundant stylolites.
234stone 234 Lumachella di Menaggio, from Menaggio, Como, Lombardy, Italy, or more likely a lumachella from Verona or Vicenza, Veneto, Italy. Fossiliferous pel-sparite limestone. It has abundant peloids and intraclasts of micritic limestone in a sparry matrix. Some layers are rich in bivalves, others are edgewise breccia together with fragments of laminated 'algal' cyanobacterial micrite.
254stone 254 Lumachella di Vialeta, from Vialeta, Verona, Veneto, Italy Synsedimentary breccia of fossiliferous bioclast-rich microsparite limestone; the matrix is intraclast-rich with spar cement.
137stone 137 Marmo bianco e giallo, breccia nuvolata, locality unknown. A fractured, stylolitised recrystallised limestone or marble, with Liesegang rings of ferruginous colouring.
250stone 250 Marmo della Gaetta, from Gaetta, Lake Como, Como, Lombardy, Italy; or more probably from the area north of Verona, Veneto, Italy. Bioclast-rich microsparite limestone with gastropods and bivalves; perhaps originally nodular/intraclastic/conglomeritic, now much brecciated. It has calcite-filled fractures and stylolites.
99stone 99 Marmo Greco scritto from Capo de Garde, Annaba (Hippo Regius), Algeria A deformed, medium to coarse-grained calcite marble. A tectonite showing linear shear fabric. The dark grey graphite-rich zones result from the deformation of a breccia or vein system rather than a colour-banded rock.
455stone 455 Mischio di Casale, from Casale, Verona, Veneto, Italy, is doubtful Limestone breccia-conglomerate with scattered large bioclasts of marine organisms in a creamy microcrystalline matrix containing forams. Note extensive suturing of grain boundaries, and calcite filled fractures.
414stone 414 Occhio di pernice, locality unknown Limestone conglomerate. Clasts are in part intraclast-rich; this may be debris flow material. Note extensive stylolites and calcite-filled fractures
123stone 123 Pavonazzetto, from Iscehisar (Synnada), Afyonkarahisar Province, Turkey Breccia-conglomerate of medium-grained white calcite marble clasts in a purple-red hematite-rich calcite matrix.
124stone 124 Pavonazzetto, from Iscehisar (Synnada), Afyonkarahisar Province, Turkey Breccia-conglomerate of medium-grained white calcite marble clasts in a purple-red hematite-rich calcite matrix.
420stone 420 Pavonazzetto, from Iscehisar (Synnada), Afyonkarahisar Province, Turkey Breccia of medium to coarse-grained calcite marble clasts in a darkred marble matrix.
917stone 917 Pavonazzetto, from Iscehisar (Synnada), Afyonkarahisar Province, Turkey Sheared marble breccia.
918stone 918 Pavonazzetto, from Iscehisar (Synnada), Afyonkarahisar Province, Turkey Sheared breccia of marble clasts.
126stone 126 Petit antique, from area around Hèche and Hèchettes, Hautes-Pyrénées, France Breccia of black and grey limestone clasts in a compact white granular calcite matrix.
621stone 621 Pietra del Vesuvio, from Mt. Vesuvius, Naples, Campania, Italy Brecciated meta-calcilutite, with brown limonitic veining, occasionally widening into calcite-limonite-opaque oxide aggregates. Some of the brown may be filler.
622stone 622 Pietra del Vesuvio, from Mt. Vesuvius, Naples, Campania, Italy Brecciated meta-calcilutite with a few spherical two-phase calcite-filled cavities, and with limonitised siliceous veining. Note brown crystals of ?siderite filling cavities on underside of specimen.
623stone 623 Pietra del Vesuvio, from Mt. Vesuvius, Naples, Campania, Italy Brecciated meta-calcilutite with veins of colourless calcite containing metallic yellow pyrite. It retains signs of soft sediment deformation in darker clasts. Some of the brown may be limonitic but most is filler/polishing compound.
629stone 629 Pietra del Vesuvio, from Mt. Vesuvius, Naples, Campania, Italy A deformed, veined carbonate-rich rock. The cream tint and red fracture-fill is caused by jeweller's rouge used for polishing, and is not evident on the unpolished side of the specimen. Yellow is wax filler. The cream end of the specimen is a strongly deformed coarse clastic rock with rounded clasts up to 20mm, some containing brown oxide zones, that plastically intrude the other part.
639stone 639 Pietra del Vesuvio, from Mt. Vesuvius, Naples, Campania, Italy Volcanic breccia. This slightly altered polygenetic volcaniclastic rock has clasts/tephra which include alkali volcanic types, sediments and possible skarn fragments. It is poorly sorted and structureless, and may be an ignimbrite.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
903stone 903 Rosso antico brecciato, from Kiyi Kislacik, Milas, Mugla Province, Turkey Breccia of calcite marble clasts in a hematitic matrix.
389stone 389 Rosso brecciato, from Kiyi Kislacik, Milas, Mugla Province, Turkey Marble breccia; matrix-supported clasts of coarse-grained grey and finer-grained white marble. Perhaps a metamorphosed debris flow.
497stone 497 Rosso Verona, from Verona, Veneto, Italy Limestone from the Jurassic Rosso Ammonitico formation. A red nodular, micritic limestone with pervasive clay-coated solution seams.
436stone 436 Semesanto di Milano, from Milan, Lombardy, Italy Lower Jurassic limestone. A crinoidal biosparite, the red crinoid debris overgrown with white calcite rims, and with coarse sparry calcite in the interstices.
409stone 409 Semesanto, from Isle of Skyros, Sporades, Central Greece Polymict sheared limestone breccia in clay-rich matrix.
608stone 608 Serpentina delle Alpi, from the Alps Silicified serpentinite breccia. Rounded clasts of granular silicified serpentine in massive quartz matrix, with streaks of cream quartz-dolomite.
598stone 598 Serpentina di Corsica, from Corsica, France Breccia of angular clasts of brown and pale green serpentinite in a paler coloured matrix with a reticulated system of very fine grey fibrous chrysotile veins throughout.
963stone 963 Serpentina di Santa Caterina, from Santa Caterina, island of Elba, Livorno, Tuscany, Italy Serpentinite, finely brecciated and veined with calcite.
484stone 484 Serpentina di Torino from the province of Turin, Piedmont, Italy Poorly-sorted breccia of heavily fractured, calcite-cemented clasts of serpentinite in a gritty ferruginous matrix.
575stone 575 Serpentina di Valsabbia, from Valsabbia, Brescia, Lombardy, Italy Breccia with clasts mainly of serpentinite/ophicalcite, a few of marble.
573stone 573 Serpentina verde di Calabria, from Calabria, Italy Brecciated serpentinite.
594stone 594 Serpentina verde di Genova, from Genoa, Liguria, Italy Brecciated serpentinite. Broken clasts of pale green serpentine, platey 'striped' dark green serpentine and brown/white marble in a matrix of brown and white calcite.
584stone 584 Serpentina verde di Polcevera, from Polcevera, Genoa, Liguria, Italy Brecciated serpentinite.
585stone 585 Serpentina verde di Polcevera, from Polcevera, Genoa, Liguria, Italy Brecciated serpentinite.
586stone 586 Serpentina verde di Polcevera, from Polcevera, Genoa, Liguria, Italy Brecciated serpentinite.
587stone 587 Serpentina verde di Polcevera, from Polcevera, Genoa, Liguria, Italy Brecciated serpentinite.
571stone 571 Serpentina verde di Susa, from Val di Susa, Turin, Piedmont, Italy Serpentinite veined with fine-grained grey calcite.
569stone 569 Serpentina verde di Varallo, from Varallo, Novara, Piedmont, Italy Brecciated serpentinite-marble with light to dark green fragmented serpentinite clasts in fine-grained marble and vein calcite matrix. Serpentinite has local concentrations of fine-grained oxide mineral.
570stone 570 Serpentina verde di Varallo, from Varallo, Novara, Piedmont, Italy A sheared breccia of serpentinite clasts in fine-grained calcite matrix, with abundant streaks and grains of dark grey oxide minerals.
764stone 764 Sicilian jasper, diaspro di Giuliana, from Giuliana, Palermo, Sicily, Italy A fractured banded yellow and green jasper breccia, matrix and fracture fills are part chalcedony part colourless quartz. Microfossils are abundant in bright yellow areas.
767stone 767 Sicilian jasper, diaspro di Giuliana, from Giuliana, Palermo, Sicily, Italy A banded brown, yellow and green jasper breccia, matrix and fracture fills are part chalcedony part colourless quartz, fractures also with bands of pyrite. Microfossils are evident in some bright yellow areas.
771stone 771 Sicilian jasper, diaspro di Giuliana, from Giuliana, Palermo, Sicily, Italy Brecciated red jasper with heavily-fractured agate matrix. Wider fractures are filled with white fine-grained quartz and yellowish carbonate mineral, the latter also present as colourless-yellow zoned rhombohedral crystals in both jasper and agate matrix. Pinkish-brown areas are filler.
774stone 774 Sicilian jasper, diaspro di Giuliana, from Giuliana, Palermo, Sicily, Italy Breccia or red jasper clasts in a white quartz/agate matrix, re-fractured and cemented with colourless crystalline quartz containing scattered inclusions of green chlorite.
778stone 778 Sicilian jasper, diaspro di Giuliana, from Giuliana, Palermo, Sicily, Italy Brecciated jasper. Red hematitic pellitic clasts are brown, goethitic at margins and along fractures, and are surrounded by milky agate. Matrix is creamy white granular/drusy calcite with patchy iron-staining.
779stone 779 Sicilian jasper, diaspro di Giuliana, from Giuliana, Palermo, Sicily, Italy A breccia of green and brown jaspery siliceous clasts in a red, iron-stained, calcareous matrix
762stone 762 Sicilian jasper, diaspro di Misilmeri, from Misilmeri, Palermo, Sicily, Italy Brecciated jasper. Heavily fractured clasts are green or transparent with patchy yellow inclusions. Cement is crystalline quartz and pale green microcrystalline calcite. Dark brown and dark green speckled areas are filler.
781stone 781 Sicilian jasper, diaspro di Moardo, from Monte Moardo, Altofonte, Palermo, Sicily, Italy Silicified polymict limestone breccia, of fractured clasts with a drusy overgrowth of white quartz crystals in turn coated with agate. Matrix is orange iron-stained or white granular quartz. Note relic microfauna.
776stone 776 Sicilian jasper, diaspro di Palermo, probably diaspro di Navurra, from Palermo, Sicily, Italy; most probably from Feudo Navurra, near Casteldaccia. Brecciated jasper, clasts mottled orange/red with colourless/scarlet banded agate around rims. Matrix is impure grey or pure white coarsely crystalline calcite.
772stone 772 Sicilian jasper, diaspro di San Stefano di Quisquina, from Santo Stefano Quiquina, Bivona, Agrigento, Sicily, Italy Silicified limestone breccia with agate/crystalline quartz matrix and filling of fractures. Darker brown areas are filler.
761stone 761 Sicilian jasper, diaspro di Santa Cristina Gela, from Santa Cristina Gela, Palermo, Sicily, Italy Breccia of yellow-brown jasper clasts cemented by agate, with cavities infilled by colourless quartz crystals. The whole rock has been heavily fractured, and recemented with quartz or with brown to black iron/manganese oxides, which also emanate as dendrites from fractures. A wide vein of granular orange calcite crosses the back of the specimen.
977stone 977 Sicilian jasper, diaspro di Sicilia, from Sicily, Italy Brecciated orange-brown jasper with fractured agate matrix. Goethite forms inclusions in matrix and full/partial rims to clasts. Dendritic manganese oxides emanate from clast fractures, crystalline quartz fills smaller voids, microcrystalline calcite the larger ones.
978stone 978 Sicilian jasper, diaspro di Sicilia, from Sicily, Italy Brecciated red jasper with heavily fractured agate matrix patchily speckled with hematitic inclusions. Diffuse brown goethite forms inclusions and full/partial rims to clasts. Dendritic manganese oxides are common along fractures in matrix, crystalline quartz fills smaller voids, microcrystalline calcite the larger ones.
982stone 982 Sicilian jasper, diaspro di Sicilia, from Sicily, Italy Brecciated yellow-brown jasper, agate-filled fractures and matrix, voids filled with crystalline quartz.
741stone 741 Sicilian jasper, diaspro di Sicilia, from Sicily, Italy, and most probably from Giancavallo, Bisaquino, Grattieri, or Santa Caterina, all in the province of Palermo. Brecciated jasper (ferruginous compact fine-grained quartz); brown/yellow/green translucent clasts in colourless crystalline quartz matrix. Yellow speckled 'clasts' and brown 'veins' are wax filler.
735stone 735 Sicilian jasper, diaspro-agata di Adrano, from Adriano, Sicily, Italy Brecciated yellow jasper, clasts heavily fractured, fracture-fill and matrix are greyish white chalcedony stained yellowish away from clasts. Brown patches on specimen are filler, generally in crystalline quartz-lined cavities.
737stone 737 Sicilian jasper, diaspro-agata di Caccamo, from Caccamo, Palermo, Sicily, Italy Brecciated jasper with yellow brown-dark brown clasts. Colourless crystalline quartz matrix has areas of chalcedony with botryoidal surface clearly visible in some places.
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