968 |
almost certainly breccia del Taigeto, breccia verde di Sparta, from the area of Krokees (Levetsova), Laconia, Peloponnese, Greece |
Synsedimentary breccio-conglomerate with clasts of porphyritic andesite. |
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. |
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. |
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. |
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. |
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. |
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. |
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. |
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. |
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. |
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. |
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). |
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. |
815 |
Granito bigio, granito bigio pediculare, from the area between Frejus and Dramont, Esterel Mountains, Var, France |
Porphyritic dacite, with phenocrysts of euhedral and larger white compositionally zoned plagioclase feldspars, and dark green to black hornblende. |
826 |
Granito bigio, granito bigio pediculare, from the area between Frejus and Dramont, Esterel Mountains, Var, France |
Porphyritic dacite, with phenocrysts of elingate plagioclase crystals and green and black amphibole (augite and hornblende?). |
817 |
Granito bigio, granito a morviglione, porfido bigio di Sibilio, from the area between Frejus and Dramont, Esterel Mountains, Var, France |
Porphyritic dacite, with large phenocrysts of white compositionally zoned plagioclase feldspars, and green-black zoned amphibole (altered hornblende), with a little biotite. |
792 |
Granito bigio, granito a morviglione, from the area between Frejus and Dramont, Esterel Mountains, Var, France |
Porphyritic dacite, with phenocrysts of white compositionally zoned plagioclase feldspar and dark green to black hornblende. |
793 |
Granito bigio, granito a morviglione, from the area between Frejus and Dramont, Esterel Mountains, Var, France |
Porphyritic dacite, with phenocrysts of white compositionally zoned plagioclase feldspar and dark green hornblende. |
816 |
Granito bigio, granito a morviglione, from the area between Frejus and Dramont, Esterel Mountains, Var, France |
Porphyritic dacite, with phenocrysts of white-pink compositionally zoned plagioclase feldspars, black hornblende, and a few scattered quartz crystals. |
887 |
Corsican granite, granito di Corsica, from Corsica, France |
Porphyritic microdiorite, probably plagioclase/biotite, over much of the specimen. Replacement of feldspar by aggregates of epidote is gradational in places, but sharp across a 1mm wide sheer zone or veinlet. |
795 |
Swedish porphyry, from Älvdalen, Dalarna, Sweden |
Lamprophyre (minette group). Poikilocrysts of brown (?kaersutitic) amphibole up to 25mm enclosing subhedral crystals of pyroxene, feldspar and opaque mineral. Groundmass contains carbonate and possible feldspathoid. |
785 |
Imperial porphyry, porfido bastardone, from Gebel Dokhan, Eastern Desert, Egypt |
Andesite-dacite porphyry; the 'bastardone' variety with white phenocrysts of plagioclase feldspar largely concentrated in scattered patches of brown groundmass. The purple colour of the greater part of this stone is due largely to trace piemontite, the manganese member of the epidote group, and indicates a degree of metamorphism. |
796 |
most probably Lapis Iaracites, porfido verde Egiziano, from Gebel Dokhan, Eastern Desert, Egypt |
Andesite-dacite porphyry of white plagioclase phenocrysts in a grey-black groundmass. Very minor epidotisation of the plagioclase. |
808 |
Imperial porphyry, porfido nero, from Gebel Dokhan, Eastern Desert, Egypt |
Andesite-dacite porphyry of white rectangular plagioclase phenocrysts in a dark grey groundmass. |
788 |
Imperial porphyry, porfido nero, from Gebel Dokhan, Eastern Desert, Egypt |
Andesite-dacite porphyry of white plagioclase phenocrysts in a black groundmass. |
787 |
Lapis ieracites, porfido verde egiziano, from Gebel Dokhan, Eastern Desert, Egypt |
Andesite-dacite porphyry of white plagioclase phenocrysts with epidotised rims in a greenish-black groundmass. |
786 |
Imperial porphyry, porfido bigio, from Gebel Dokhan, Eastern Desert, Egypt |
Andesite-dacite porphyry; pink to white phenocrysts of plagioclase feldspar and black euhedral crystals of hornblende in a grey-brown groundmass. |
783 |
Imperial porphyry, porfido rosso antico, from Gebel Dokhan, Eastern Desert, Egypt |
Andesite-dacite porphyry with pink phenocrysts of plagioclase feldspar. The purple colour is due largely to trace piemontite, the manganese member of the epidote group, and indicates a degree of metamorphism. It is from the Precambrian basement rocks. |
784 |
Imperial porphyry, porfido rosso antico, from Gebel Dokhan, Eastern Desert, Egypt |
Andesite-dacite porphyry with patches of white phenocrysts of plagioclase feldspar. The purple colour is due largely to trace piemontite, the manganese member of the epidote group, indicating a degree of metamorphism. It is from the Precambrian basement rocks. |
857 |
Granito di Corsica, from Corsica, France; or lapis sarcophagus, from Behram (the ancient Assos), Çanakkale Province, Turkey |
Probably a porphyritic andesite, with plagioclase feldspar and augite phenocrysts. |
807 |
'Porfido serpentino antico', locality unknown |
Grey porphyry, perhaps a porphyritic diorite or granodiorite with phenocrysts of white plagioclase. |
811 |
Porfido delle Alpi, from the Alps |
Porphyry with large phenocrysts of white plagioclase feldspar. |
854 |
Granito dell'Elba, from the island of Elba, Livorno, Tuscany, Italy |
Megacrystic quartz porphyry. Megacrysts of white sub-euhedral feldspar with combined simple and lamellar twinning. Subhedral-rounded glassy quartz phenocrysts (and glomerocrysts) up to 10mm with pale lilac colour. Two feldspar groundmass, buff and white. Partially uralitised amphibole<5%. All set in pale greenish-grey fine-grained matrix. |
789 |
probably porfido Trentino, from the Alps, and probably from the area of Bolzano, Trentino-Alto Adige, Italy |
Porphyritic rhyolite or dacite with phenocrysts of quartz, feldspar and biotite. |
790 |
Porfido Trentino, porfido Atesino, from Bolzano area, Trentino-Alto Adige, Italy |
Pophyritic rhyolite with phenocrysts of quartz, feldspar and biotite. |
809 |
Porfido serpentino nero, from Wadi Umm Towat, near Gebel Dokhan, Eastern Desert, Egypt |
Trachyandesite porphyry with white phenocrysts of plagioclase feldspar. |
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. |
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. |
858 |
Corsican granite, granito di Corsica, from Corsica, France |
Pale grey quartz porphyry. White phenocrysts of feldspar with brownish alteration, glassy quartz and dark green uralitised amphibole in very fine-grained grey groundmass. Phenocrysts tend to form clusters. |
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. |
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.
|
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. |
862 |
Granito delle Alpi, from the Alps |
Quartzite. Pale grey, equigranular. Minor feldspar interstitial haematitic staining. |
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. |
818 |
Granito bigio grafico, from Fontaine du Gènie, Tipaza, Algeria; or just possibly syenite della Balma, from Balma Biallese, Biella, Lombardy, Italy |
Medium to fine-grained syenite of predominantly plagioclase feldspar, beige-coloured potash feldspar, black hornblende, and biotite. |
852 |
Granito bigio grafico, from Fontaine du Gènie, Tipaza, Algeria; or just possibly syenite della Balma, from Balma Biallese, Biella, Lombardy, Italy |
Medium to fine-grained syenite of predominantly plagioclase feldspar, beige-coloured potash feldspar, biotite, muscovite and black hornblende. |
900 |
Granito di Napoli, from Naples, Campania, Italy |
Biotite tonalite. Coarse-grained, with a gneisssose structure developed at one end of specimen. Mica shows rusty-coloured alteration. |
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. |
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. |
667 |
Lava di Borghetto, from Borghetto, Civita Castellana, Viterbo, Lazio, Italy |
Phonolite tephrite. A porphyritic rock with euhedral white megacrysts of leucite and scattered black pyroxene crystals in a fine-grained groundmass. The leucite megacrysts are cracked, sometimes concentrically zoned, and contain inclusions of pyroxene. |
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. |
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. |
673 |
Basalte verde, locality unknown |
'Greenstone' - a metabasalt or metabasaltic tuff flecked with iron-rich spots. |
674 |
Basalte listata, possibly from Wadi Hammamat, Eastern Desert, Egypt |
Most probably a metagreywacke, a metamorphosed turbidite deposit with sand to silt sized particles. |
676 |
Basalte antico, Bekhen-stone, from Wadi Hammamat, Eastern Desert, Egypt |
Most probably a metagreywacke, a metamorphosed turbidite deposit with sand to silt sized particles. |
583 |
'Serpentina verde dell'Elba', from the island of Elba, Livorno, Tuscany, Italy |
Actinolite rock. Radiating crystals of actinolite; the surface is coated with brown filler. |
588 |
Serpentina di Corsica, from Corsica, France |
Amphibolite; probably mostly actinolite - mainly granular but fibrous/prismatic in veins. Irregular patches and veinlets of opaque oxide (probably magnetite). Contains disseminated pale yellow carbonate flecks. |
868 |
Granito delle Alpi, from the Alps |
Medium-grained meta-basite with plagioclase megacrysts. Irregular thin veins are coloured light brown by wax filler. |
751 |
Diaspro delle Alpi, from the Alps (not confirmed) |
Deformed ferruginous chert, markedly dense hematite-rich rock. Fractures are filled with greenish quartz. It might be associated with an ophiolite deposit. |
560 |
Lavagna antica, locality unknown |
Fine-grained siliceous rock with a few carbonate grains; The aggregates of orange-brown crystals are almost certainly relics of pyrite crystals; elsewhere, the pyrite is visible. Slate is not confirmed. |
865 |
Granito dell'Elba, from the island of Elba, Livorno, Tuscany, Italy |
Biotite-rich migmatitic granitoid gneiss. Pink potash feldspar is concentrated in leucosomes, quartz and plagioclase in biotite-rich palaeosomes. |
879 |
Granito delle Alpi, from the Alps |
Coarsely foliated diorite gneiss. |
619 |
Serpentina di Corsica, from Corsica, France |
Strongly-foliated epidote-rich gneiss, probably derived from a basic igneous rock. |
864 |
Corsican granite, granito di Corsica, from Corsica, France |
Rather fine-grained granitic gneiss with slightly discordant coarse-granitoid veins (perhaps migmatite leucosomes) . It is variably reddened and cut by late fractures near which feldspars have been altered to white spots. Veins near corner of specimen are leek green. |
899 |
'Granito di Napoli', locality unknown |
Pink granite gneiss, augen are recrystallised potash feldspar. The quartz is rather finely recrystallised. |
897 |
Corsican granite, granito di Corsica, from Corsica, France |
Granite gneiss with large porphyroblasts of potassium feldspar. |
848 |
Granito Misio, from Kozak Mountains (the ancient Pergamon), Izmir,Turkey; or granito antico, from Gebel Dokhan (Mons Claudianus)-Wadi Umm Huyut area, Eastern Desert, Egypt. |
Tonalite gneiss with black hornblende. Distinct foliation evident on side of specimen. |
677 |
Basalte di Venezia, from Venice, Veneto, Italy |
'Greenstone' - a brecciated metabasaltic tuff with calcite veins. Some clasts show weak graded bedding. |
607 |
'Serpentina delle Alpi', from the Alps, or more probably verde dell'Elba from the island of Elba, Livorno, Tuscany, Italy |
Ultrabasic rock composed of sprays up to a centimetre long of light green actinolite. These penetrate large dark sprays of amphibole, most probably hornblende. |
610 |
'Serpentina dell'Elba', from the island of Elba, Livorno, Tuscany, Italy |
Actinolite rock, the actinolite in sprays up to a centimetre long. The large dark amphiboles (probably hornblende), also in radiating clusters, result from a later hydrothermal event. |
595 |
Serpentina di Chiavari, from Chiavari, Genoa, Liguria, Italy |
Altered peridotite. The green is mainly fine actinolite; whitish areas are scattered with tiny opaque flakes perhaps of chromite. The dark coloured oxide, probably magnetite, has with brown and green-black reaction rims. |
617 |
'Serpentina dell'Elba', from the island of Elba, Livorno, Tuscany, Italy |
Heavily alterered ?peridotite/pyroxenite; now composed mainly of actinolite. |
612 |
Serpentina delle Alpi, from the Alps (not confirmed) |
Metagabbro? |
614 |
Serpentina delle Alpi, from the Alps |
Metagabbro? |
616 |
Serpentina delle Alpi, from the Alps |
Metagabbro. |
672 |
Basalte scura, very possibly from Wadi Hammamat, Eastern Desert, Egypt |
Most probably a metagreywacke, a metamorphosed turbidite deposit with sand to silt sized particles. |
601 |
'Serpentina dell'Elba', from the island of Elba, Livorno, Tuscany, Italy |
Metaperidotite, mainly actinolite, but with minor opaque oxide, cut by greyish veins. |
597 |
Serpentina verde di Genova, from Genoa, Liguria, Italy |
Metaperidotite - probably serpentine and actinolite. |
861 |
Beola di Milano, from Milan, Lombardy, Italy |
Mica schist. |
489 |
Breccia degli Appennini, from the Apennines, Italy |
Deformed granitoid; porphyroblasts are quartz dominantly, perhaps originally vein quartz, now disrupted. |
606 |
Serpentine, possibly Sterzinger Serpentin, from Vipiteno (Sterzing), Bolzano, Trentino-Alto Adige, Italy |
Strongly-foliated meta-ultrabasic rock, green domains appear to be finely-recrystallised tremolite/actinolite. Large pinkish-brown augen-shaped grains may be orthopyroxene, altered to varying degrees. Pyrite and chromite/magnetite are abundant. |
421 |
Breccia della villa Adriana, breccia Quintilina, most probably from Levanto, Liguria, Italy |
Serpentinite breccia. |
593 |
Marmo di Santa Cattarina dell'Elba, from the island of Elba, Livorno, Tuscany, Italy |
Serpentinite, finely brecciated and veined with calcite. |
675 |
Basalte fiorita, locality unknown |
Serpentinised metabasalt with rounded aggregates of crystallites. Some small vesicles are filled with dark calcite. |
708 |
Marmor aequipondus, perhaps from Liguria, Italy |
Serpentinised (or possibly fine amphibolitised) peridotite with coarse-grained green former pyroxenes, pale green former olivine domains, and opaque oxide. |
571 |
Serpentina verde di Susa, from Val di Susa, Turin, Piedmont, Italy |
Serpentinite veined with fine-grained grey calcite. |
573 |
Serpentina verde di Calabria, from Calabria, Italy |
Brecciated serpentinite. |
584 |
Serpentina verde di Polcevera, from Polcevera, Genoa, Liguria, Italy |
Brecciated serpentinite. |
585 |
Serpentina verde di Polcevera, from Polcevera, Genoa, Liguria, Italy |
Brecciated serpentinite. |
586 |
Serpentina verde di Polcevera, from Polcevera, Genoa, Liguria, Italy |
Brecciated serpentinite. |
587 |
Serpentina verde di Polcevera, from Polcevera, Genoa, Liguria, Italy |
Brecciated serpentinite. |
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. |
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. |
600 |
Serpentina delle Alpi, from the Alps (not confirmed) |
Serpentinite with calcite-filled veins and cavities. |
609 |
Serpentina verde di Sardegna, from Sardinia, Italy |
Serpentinite with hints of coarse-grained peridotite microstructure evident in dark domains. Contains scattered crystals of pyrite and disseminated flecks of pale yellow carbonate mineral. |
679 |
Breccia verde d'Egitto, Breccia universale, from Wadi Hammamat, Eastern Desert, Egypt |
Metaconglomerate of metamorphic and igneous clasts (banded tuff, serpentinite, etc) in a sheared chloritised or epidotised matrix. Note that granitic clasts commonly also occcur in this stone, see 969. |
620 |
Serpentina di Genova, from Genoa, Liguria, Italy |
Silicified serpentinite. Rounded fragments of serpentinite with abundant euhedral to granular oxide inclusions in minor quartz matrix. The edges of the fragments have blue-green reaction rims. |
613 |
Serpentina delle Alpi, perhaps serpentina di Valmalenco, from the Alps, and perhaps Valmalenco, Sondrio, Lombardy, Italy |
Serpentinite with rounded grains and granular aggregates of grey oxide mineral in dirty-yellow to blue-green serpentine. Two weak foliations evident. |
572 |
Serpentina verde di Susa, from Val di Susa, Turin, Piedmont, Italy |
Heavily fractured serpentinite, cemented with grey calcite. |
592 |
Serpentina di Corsica, from Corsica, France |
Serpentinised harzburgite with coarse relict texture making it easy to distinguish former olivine and orthopyroxene domains. Note the chrysotile veins. |