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
515stone 515 Diaspro di Volterraio, from Volterraio, island of Elba, Livorno, Tuscany, Italy A siliceous argillaceous deposit, perhaps a deep sea red clay.
976stone 976 'Diaspro d'Egitto', locality unknown Breccia of green iron-rich prase/aventurine? fragments in a chalcedony matrix. Abundant ferruginous ‘debris’ is in places altered to orange goethitic and red hematitic spherules. A broad colourless chalcedony vein traverses specimen.
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.
979stone 979 Diaspro delle Alpi, from the Alps Poorly sorted breccio-conglomerate with very heavily fractured argillaceous siliceous clasts and a calcarenite cement. Brown is filler/polishing compound.
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.
765stone 765 Sicilian jasper, diaspro di Castro Giovanni, from either Enna, Sicily, or more probably Monte di Castrogiovanni, near Bivona, Agrigento, Sicily, Italy Silicified limestone/limestone conglomerate coloured black by included crystals of hematite. A large yellow goethitic pebble is prominent, and scattered mollusc shells are also evident. Matrix and fracture fills are chalcedony.
760stone 760 'Diaspro delle Alpi', from the Alps Chert; a silicified limestone with abundant forams and other fossil debris.
766stone 766 Sicilian jasper, diaspro di San Stefano di Quisquina, from Santo Stefano Quisquina, Agrigento, Sicily, Italy Silicified polymict limestone conglomerate with scattered pyrite and rhombohedral ?dolomite crystals, and some residual fossils. Matrix is part chalcedonic, part colourless quartz. Speckled green areas are filler.
698stone 698 Pudingo delle Alpi, from the Alps Well-sorted quartz conglomerate with subsidiary lithic clasts.
995stone 995 Granito antico, locality unknown Porphyrtic trachyte. Abundant feldspar phenocrysts up to 15mm showing complex twinning, concentric zoning of inclusions and a tendency to cluster. Sparse microphenocrysts of amphibole substantially altered to rusty brown mineral (also occurs in the white feldspars). Possible rare quartz phenocrysts. Groundmass of milky-white and pale grey feldspars showing tendency to fluidal structure round phenocrysts. Occasional angular (?cognate) xenoliths of fine-grained equigranular rock consisting of feldspar and altered amphibol;e.
999stone 999 Granito delle Alpi, from the Alps Sepentinite. Very coarse-grained. Mottled dark and lighter green. Dark green, veined and cleaved altered pyroxene perhaps with original exsolution texture. Pale green (?) antigorite pseudomorphs retaining ghost fracture pattern of original olivine. One end of specimen shows clasis with constituent minerals forming granular aggregate. White cross-cutting veins contain carbonate and silicate.
867stone 867 Granito delle Alpi, from the Alps Foliated coarse meta-basite.
843stone 843 Granito antico, locality unknown Biotite tonalite, rich in biotite. Equigranular, with glassy plagioclase and subordinate alkali feldspar. Dark mica emphasises faint gneissose texture.
853stone 853 'Granito dell'Elba'; the island of Elba, Livorno, Tuscany, Italy, is not confirmed Dacite lava with phenocrysts of quartz, plagioclase feldspar and a pale green pyroxene.
986stone 986 Granito antico, possibly granito verde fiorito di bigio from Wadi Umm Balad, near Gebel Dokhan, Eastern Desert, Egypt Quartz diorite.
996stone 996 Granito antico, very possibly granito bianco e nero gabino, from Bir Umm Fawakhir, near Wadis Hammamt and el-Sid, Eastern Desert, Egypt Granodiorite.
829stone 829 possibly granito nero, from between Aswan and Shellal District, Nile Valley, Egypt Biotite granodiorite with some alteration to chlorite; possibly a variety of the Aswan granodiorite from the Precambrian basement rocks.
842stone 842 Granito antico, locality unknown; possibly a variety of granito nero from between Aswan and Shellal District, Nile Valley, Egypt Biotite-bearing granodiorite with a band crossing the specimen of more granitic composition with pink potash feldspars.
993stone 993 Granito antico, locality unknown Fine-grained hornblende biotite granodiorite; some mafic grains included within quartz.
836stone 836 Granito nero, from between Aswan and Shellal District, Nile Valley, Egypt Biotite granodiorite with a few megacrysts of pink potash feldspar; a variety of the Aswan granodiorite from the Precambrian basement rocks.
814stone 814 most probably granito nero, from between Aswan and Shellal District, Nile Valley, Egypt Biotite granodiorite; probably a variety of the Aswan granodiorite from the Precambrian basement rocks.
611stone 611 Verde duro di Massa e Carrara, most probably from the Apuan Alps of Italy Coarse-grained diorite.
889stone 889 Granito delle Alpi, from the Alps Coarse pale grey granodiorite displaying faint foliation.
883stone 883 Granito delle Alpi, from the Alps Coarse foliated granodiorite with prominent pink potash-feldspar; plagioclase is pale green.
884stone 884 Granito delle Alpi, from the Alps or possibly Bombiana, Bologna, Emilia-Romagna, Italy Coarse foliated hornblende diorite with chloritic inclusions in the plagioclase.
885stone 885 Granito delle Alpi, from the Alps; or perhaps from Predazzo, Trentino or elsewhere in Trentino-Alto Adige, Italy Coarse-grained quartz diorite with pale green plagioclase. Brown is filler/polishing compound.
987stone 987 Granito antico, locality unknown Granodiorite, pinkish potash feldspar.
847stone 847 Marmor Claudianum, granito del Foro, from Mons Claudianus, Eastern Desert, Egypt It is a weakly metamorphosed granodiorite showing some foliation, and composed mainly of plagioclase feldspar, hornblende, biotite, and lesser amounts of quartz, with traces of epidote.
830stone 830 just possibly granito nero, from between Aswan and Shellal District, Nile Valley, Egypt Fine-grained hornblende biotite granodiorite; just possibly a variety of the Aswan granodiorite from the Precambrian basement rocks.
851stone 851 Granito delle Alpi, from the Alps Hornblende granodiorite. Grey, equigranular. Faint alignment of feldspars. Uralitic alteration of amphibole. Larger plagioclases zoned outwards to untwinned feldspar. Occasional sphene visible with lens.
866stone 866 Granito dell'Elba, from the island of Elba, Livorno, Tuscany, Italy Hornblende granodiorite with occasional plagioclase-rich clusters.
845stone 845 Granito nero, from between Aswan and Shellal District, Nile Valley, Egypt Biotite-bearing granodiorite with a few aligned feldspar megacrysts.
856stone 856 Granito, probably granito di Corsica, from Corsica, France Coarse-grained granodiorite with megacrysts of pink potash-feldspar, rather smoky quartz, and accessory titanite.
882stone 882 Granito delle Alpi, from the Alps; or perhaps granito bigio dell'Elba, from the island of Elba, Livorno, Tuscany, Italy Medium-grained grey granodiorite with coarser patches and detached plagioclase megacrysts. Perthitic structure of the megacrysts gives a pale blue-grey iridescence.
844stone 844 Granito bianco e nero, from Wadi Barud, near Mons Claudianus, Eastern Desert, Egypt Quartz diorite with megacrysts of hornblende, white plagioclase feldspar and minor quartz.
896stone 896 Granito delle Alpi, from the Alps Metadiorite with distinct foliation. Brown areas are polishing compound/filler.
895stone 895 Granito delle Alpi, from the Alps Foliated metadiorite or metagabbro with a coarse, ferromagnesium-rich band traversed by shear lines rich in dark mafic minerals, containing megacrysts/augen of plagioclase.
880stone 880 Granito delle Alpi, from the Alps Fine to medium-grained meta-diorite with megacrysts of plagioclase, some containing very small dark inclusions; with pervasive iron oxide staining.
886stone 886 Pietra di Malanaggio, from Malanaggio, Val Chisone, Piedmont, Italy A foliated, recrystallised medium-grained meta-granodiorite.
881stone 881 Pietra di Malanaggio, from Malanaggio, Val Chisone, Piedmont, Italy Grey medium-grained foliated meta-granodiorite with aligned brownish altered amphibole.
890stone 890 Granito delle Alpi, from the Alps Grey microgranodiorite with ferromagnesian-rich irregular patches. Veinlets and cavities are coloured by brown filler/polishing compound. Alignment of biotite crystals gives distinct foliation, evident on sides of specimen.
874stone 874 Granito orbiculare di Corsica, from shore of River Taravo, near Olmeto, Corse-du-Sud, Corsica, France Orbicular diorite, the layers composed of plagioclase, hornblende, or a combination of these minerals.
813stone 813 Granito della Colonna, from Wadi Umm Shegilat, near Gebel Abu el-Hasan, Eastern Desert, Egypt Coarse pegmatitic diorite, with large black prismatic crystals of hornblende.
823stone 823 Granito antico, granito della Colonna, from Wadi Umm Shegilat, near Gebel Abu el-Hasan, Eastern Desert, Egypt Coarse pegmatitic diorite, with large black prismatic crystals of hornblende.
990stone 990 Granito antico, possibly granito verde fiorito di bigio from Wadi Umm Balad, near Gebel Dokhan, Eastern Desert, Egypt Quartz diorite.
888stone 888 Granito delle Alpi, from the Alps Medium-grained quartz diorite.
876stone 876 probably granito nero, from between Aswan and Shellal District, Nile Valley, Egypt Amphibole-rich granodiorite-tonalite with megacrysts of plagioclase, and accessory titanite. There is some alignment of megacrysts giving faint foliation.
846stone 846 Granito nero, from between Aswan and Shellal District, Nile Valley, Egypt Biotite-bearing granodiorite with a few small pink K-feldsar megacrysts, and a vein of potash feldspar across the corner of the sample.
877stone 877 Granito delle Alpi, from the Alps Diorite. Grey, medium-grained with sparse white feldspar megacrysts up to 20mm in groundmass of white feldspar, partially altered dark green amphibole.
871stone 871 Granito delle Alpi, from the Alps Diorite. Individual and clustered crystals of green pyroxene and scattered black hornblende crystals in a white predominantly plagioclase groundmass. Dark blebs are entirely pyroxene.
850stone 850 Granito delle Alpi, from the Alps Quartz diorite. Coarse-grained, equigranular. Plagioclase, amphibole (altering to yellow micaceous mineral), minor quartz.
998stone 998 Granito delle Alpi, from the Alps Feldsparphyric diorite. Fractured and replaced zoned feldspar phenocrysts and rarer clusters of amphibole, are set in a granular groundmass of white feldspar, quartz and a ferromagnesian mineral. It has pervasive chloritic alteration and granular recrystallisation. Pale green veins cross the specimen
827stone 827 Granito antico, locality unknown Fine-grained gabbro, rich in grains of pyrite the oxidation of which has caused some ferruginous staining.
821stone 821 Granito della Sedia di San Pietro, from Wadi Umm Wikala, near Wadi Semna, Eastern Desert. Egypt Gabbro or metagabbro (weakly metamorphosed) with some alteration of the green augite to brown?
822stone 822 Granito della Sedia di San Pietro, from Wadi Umm Wikala, near Wadi Semna, Eastern Desert. Egypt Gabbro or metagabbro (weakly metamorphosed) with some alteration of the green augite to brown?
825stone 825 Granito verde della Sedia di San Lorenzo, from Wadi Umm Wikala, near Wadi Semna, Eastern Desert. Egypt Fine to medium-grained gabbro or metagabbro (weakly metamorphosed) with some alteration of the green augite to brown?
591stone 591 Serpentina di Corsica, from Corsica, France Strongly altered and deformed coarse-grained former olivine gabbro. Note areas with disseminated pale yellow carbonate flecks.
911stone 911 Cipollino verde, locality unknown Heterogeneously deformed very coarse-grained metagabbro with ophitic texture locally preserved in lenticular low-strain domains.
989stone 989 Gabbro eufotide, from Wadi Maghrabiya, Eastern Desert, Egypt Weakly metamorphosed coarse-grained gabbro with a subtle schiller to the plagioclase feldspar.
873stone 873 Granito di Genova, from Genoa, Liguria, Italy Coarse-grained metagabbro, with serpentinised pyroxene crystals.
700stone 700 Verde di Corsica, smaragdite, from near Orezza, Monte San Petrone, Haute-Corse, Corsica, France Metagabbro, the diopside and actinolite-tremolite both coloured bright green by trace chromium.
702stone 702 Verde plasma di Corsica, from near Orezza, Monte San Petrone, Haute-Corse, Corsica, France Metagabbro, the diopside and actinolite-tremolite both coloured bright green by trace chromium.
828stone 828 Granito verde a erbetta, from Wadi Umm Wikala, near Wadi Semna, Eastern Desert. Egypt Fine to medium-grained metagabbro, with extensive alteration of augite to chlorite and some chloritisation around the edges of plagioclase feldspar crystals. Metallic pale yellow pyrite is present as scattered crystals.
872stone 872 Granito di Corsica, from Corsica, France Strongly foliated meta-gabbro, brown areas are filler/polishing compound.
824stone 824 Granito antico, locality unknown Medium-grained gabbro or metagabbro (lightly metamorphosed). Minor grains of pyrite.
973stone 973 'Verde di Corsica', from Corsica, France is unlikely; perhaps from the Alps Proabably a metagabbro, with trace chromium colouring the pyroxene crystals bright green.
701stone 701 Verde di Corsica mandolato, from near Orezza, Monte San Petrone, Haute-Corse, Corsica, France Sheared metagabbro, the diopside and actinolite-tremolite both coloured bright green by trace chromium.
964stone 964 Corsica, from Corsica, France Metagabbro. A weakly metamorphosed gabbroic pegmatite, with green diopside (pyroxene) and brighter green aggregates of acicular actinolite-tremolite (amphibole) crystals. Some black grains of an oxide mineral are present.
855stone 855 Granito di Corsica, from Corsica, France Gabbro-pyroxenite. Melanocratic. Very dark green pyroxene with minor brown amphibole and interstitial white feldspar.
820stone 820 Granito antico, locality unknown Banded biotite gneiss. Medium grey bands of recrystallised quartz, feldspar and dark mica and lighter coarser bands with same mineralogy.
849stone 849 Granito delle Alpi, from the Alps Folded gneiss with granitic veins.
859stone 859 Granito di Cumiana, from Cumiana, Turin, Piedmont, Italy Probably a mylonitised granite. The brown iron-staining is less evident on reverse of specimen.
892stone 892 Bianco Montorfano, from Montorfano, Novara, Piedmont, Italy Hornblende biotite granite.
991stone 991 Granito antico, locality unknown Biotite granite. Pink, medium-grained. Pink alkali feldspar, white plagioclase and glassy quartz. Faint foliation.
894stone 894 Possibly granito di Corsica from Corsica, France, but more probably bianco Montorfano, from Montorfano, Novara, Piedmont, Italy Coarse hornblende biotite granite with accessory apatite and titanite.
893stone 893 Baveno granite, rosa Baveno, from Baveno, Novara, Piedmont, Italy Coarse hornblende granite with pale pink perthitic potash-feldspar.
992stone 992 Granito rosso antico, sienite, possibly from between Aswan and Shellal District, Nile Valley, Egypt Fine-grained hornblende biotite granite-granodiorite.
835stone 835 Granito nero, from between Aswan and Shellal District, Nile Valley, Egypt Hornblende biotite granite/granodiorite hybrid with white feldspar megacrysts. It is crossed by a pink granite (predominantly potash feldspar) vein.
833stone 833 Granito rosso antico minuto, from between Aswan and Shellal District, Nile Valley, Egypt A fairly fine-grained hornblende biotite granite/granodiorite hybrid.
841stone 841 Granite antico, locality unknown; or more probably granito di Corsica, from Corsica, France Coarse-grained granite-granodiorite with large pink perthitic megacrysts of potash feldspar. It contains scattered euhedral grains of titanite.
891stone 891 Granito delle Alpi, from the Alps Fine to medium-grained granite showing a streaky texture; with pink perthitic potash-feldspar and white plagioclase.
832stone 832 Granito rosso antico minuto, from between Aswan and Shellal District, Nile Valley, Egypt Fine-grained hornblende biotite granite.
831stone 831 Granito rosso antico minuto, from between Aswan and Shellal District, Nile Valley, Egypt Fine-grained hornblende biotite muscovite granite.
838stone 838 probably granito Sardo, from Capo Testa, Olbia-Tempio, Sardinia, Italy; but possibly granito rosso antico, from between Aswan and Shellal District, Nile Valley, Egypt A medium-grained granite with pink potash feldspar, biotite and quartz.
994stone 994 Granito antico, locality unknown Fine-grained hornblende biotite rapakivi granite with large pink perthitic phenocrysts of potash feldspar rimmed with colourless plagioclase.
837stone 837 Granito rosso antico, sienite, from between Aswan and Shellal District, Nile Valley, Egypt Coarse-grained biotite granite with large megacrysts of pink K-felspar.
839stone 839 Granito rosso antico, sienite, from between Aswan and Shellal District, Nile Valley, Egypt Coarse-grained biotite granite with megacrysts of salmon K-felspar.
840stone 840 Granito rosso antico, sienite, from between Aswan and Shellal District, Nile Valley, Egypt Coarse-grained biotite granite with megacrysts of salmon K-felspar.
988stone 988 Granito antico, locality unknown Coarse-grained hornblende biotite granite with large megacrysts of salmon pink potash feldspar.
997stone 997 Granito di Firenze, from Florence, Tuscany, Italy Hornblende biotite granite, porphyritic, with large megacrysts of potassium feldspar.
860stone 860 Granito delle Alpi, from the Alps Coarse, cataclastic granite with recrystallised quartz and rare altered mica showing kink bands.
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.
669stone 669 Selce di Roma, from the Capo di Bove, Rome, Lazio, Italy Phonolite lava has small white and black phenocrysts in a fine-grained groundmass.
819stone 819 Granito violetto, marmor Troadense, from Çigri Dâg, Ezine, Canakkale, Marmara; Turkey Medium-grained quartz monzonite with large violet-grey megacrysts of potash feldspar in a groundmass of quartz, plagioclase, biotite and hornblende.
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.
869stone 869 Corsican granite, granito di Corsica, from Corsica, France Monzonite. Anhedral pink potash feldspar, greenish altered plagioclase and interstitial green amphibole.
898stone 898 Granito delle Alpi, from the Alps Biotite monzonite. Coarse-grained mottle brown and white rock with mafics>felsics and minor quartz. Pale brown alteration of mica.
670stone 670 Obsidian, locality unknown Obsidian. Black glassy rock speckled with round white amygdales or spherulites.
574stone 574 Pietra Braschia, from The Western Alps Garnet peridotite showing reaction rims with radial structure around embayed garnets. The outer rim is probably granular pyroxene. The matrix is olivine-rich, recrystallised, with a tectonic fabric.
668stone 668 Selce di Roma, from the Capo di Bove, Rome, Lazio, Italy Altered phonolitic lava, with a few porphyric leucite and biotite crystals.
Page 8 of 10, showing 701 - 800 of 1000 stones.
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