515 |
Diaspro di Volterraio, from Volterraio, island of Elba, Livorno, Tuscany, Italy |
A siliceous argillaceous deposit, perhaps a deep sea red clay. |
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. |
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. |
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. |
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. |
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. |
760 |
'Diaspro delle Alpi', from the Alps |
Chert; a silicified limestone with abundant forams and other fossil debris. |
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. |
698 |
Pudingo delle Alpi, from the Alps |
Well-sorted quartz conglomerate with subsidiary lithic clasts. |
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. |
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.
|
867 |
Granito delle Alpi, from the Alps |
Foliated coarse meta-basite. |
843 |
Granito antico, locality unknown |
Biotite tonalite, rich in biotite. Equigranular, with glassy plagioclase and subordinate alkali feldspar. Dark mica emphasises faint gneissose texture. |
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. |
986 |
Granito antico, possibly granito verde fiorito di bigio from Wadi Umm Balad, near Gebel Dokhan, Eastern Desert, Egypt |
Quartz diorite. |
996 |
Granito antico, very possibly granito bianco e nero gabino, from Bir Umm Fawakhir, near Wadis Hammamt and el-Sid, Eastern Desert, Egypt |
Granodiorite. |
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. |
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. |
993 |
Granito antico, locality unknown |
Fine-grained hornblende biotite granodiorite; some mafic grains included within quartz. |
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. |
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. |
611 |
Verde duro di Massa e Carrara, most probably from the Apuan Alps of Italy |
Coarse-grained diorite. |
889 |
Granito delle Alpi, from the Alps |
Coarse pale grey granodiorite displaying faint foliation. |
883 |
Granito delle Alpi, from the Alps |
Coarse foliated granodiorite with prominent pink potash-feldspar; plagioclase is pale green. |
884 |
Granito delle Alpi, from the Alps or possibly Bombiana, Bologna, Emilia-Romagna, Italy |
Coarse foliated hornblende diorite with chloritic inclusions in the plagioclase. |
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. |
987 |
Granito antico, locality unknown |
Granodiorite, pinkish potash feldspar. |
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. |
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. |
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. |
866 |
Granito dell'Elba, from the island of Elba, Livorno, Tuscany, Italy |
Hornblende granodiorite with occasional plagioclase-rich clusters. |
845 |
Granito nero, from between Aswan and Shellal District, Nile Valley, Egypt |
Biotite-bearing granodiorite with a few aligned feldspar megacrysts. |
856 |
Granito, probably granito di Corsica, from Corsica, France |
Coarse-grained granodiorite with megacrysts of pink potash-feldspar, rather smoky quartz, and accessory titanite. |
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. |
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. |
896 |
Granito delle Alpi, from the Alps |
Metadiorite with distinct foliation. Brown areas are polishing compound/filler. |
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. |
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. |
886 |
Pietra di Malanaggio, from Malanaggio, Val Chisone, Piedmont, Italy |
A foliated, recrystallised medium-grained meta-granodiorite. |
881 |
Pietra di Malanaggio, from Malanaggio, Val Chisone, Piedmont, Italy |
Grey medium-grained foliated meta-granodiorite with aligned brownish altered amphibole. |
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. |
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. |
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. |
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. |
990 |
Granito antico, possibly granito verde fiorito di bigio from Wadi Umm Balad, near Gebel Dokhan, Eastern Desert, Egypt |
Quartz diorite. |
888 |
Granito delle Alpi, from the Alps |
Medium-grained quartz diorite. |
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. |
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. |
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. |
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. |
850 |
Granito delle Alpi, from the Alps |
Quartz diorite. Coarse-grained, equigranular. Plagioclase, amphibole (altering to yellow micaceous mineral), minor quartz. |
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 |
827 |
Granito antico, locality unknown |
Fine-grained gabbro, rich in grains of pyrite the oxidation of which has caused some ferruginous staining. |
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? |
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? |
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? |
591 |
Serpentina di Corsica, from Corsica, France |
Strongly altered and deformed coarse-grained former olivine gabbro. Note areas with disseminated pale yellow carbonate flecks. |
911 |
Cipollino verde, locality unknown |
Heterogeneously deformed very coarse-grained metagabbro with ophitic texture locally preserved in lenticular low-strain domains. |
989 |
Gabbro eufotide, from Wadi Maghrabiya, Eastern Desert, Egypt |
Weakly metamorphosed coarse-grained gabbro with a subtle schiller to the plagioclase feldspar. |
873 |
Granito di Genova, from Genoa, Liguria, Italy |
Coarse-grained metagabbro, with serpentinised pyroxene crystals. |
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. |
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. |
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. |
872 |
Granito di Corsica, from Corsica, France |
Strongly foliated meta-gabbro, brown areas are filler/polishing compound. |
824 |
Granito antico, locality unknown |
Medium-grained gabbro or metagabbro (lightly metamorphosed). Minor grains of pyrite. |
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. |
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. |
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. |
855 |
Granito di Corsica, from Corsica, France |
Gabbro-pyroxenite. Melanocratic. Very dark green pyroxene with minor brown amphibole and interstitial white feldspar. |
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. |
849 |
Granito delle Alpi, from the Alps |
Folded gneiss with granitic veins. |
859 |
Granito di Cumiana, from Cumiana, Turin, Piedmont, Italy |
Probably a mylonitised granite. The brown iron-staining is less evident on reverse of specimen. |
892 |
Bianco Montorfano, from Montorfano, Novara, Piedmont, Italy |
Hornblende biotite granite. |
991 |
Granito antico, locality unknown |
Biotite granite. Pink, medium-grained. Pink alkali feldspar, white plagioclase and glassy quartz. Faint foliation. |
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. |
893 |
Baveno granite, rosa Baveno, from Baveno, Novara, Piedmont, Italy |
Coarse hornblende granite with pale pink perthitic potash-feldspar. |
992 |
Granito rosso antico, sienite, possibly from between Aswan and Shellal District, Nile Valley, Egypt |
Fine-grained hornblende biotite granite-granodiorite. |
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. |
833 |
Granito rosso antico minuto, from between Aswan and Shellal District, Nile Valley, Egypt |
A fairly fine-grained hornblende biotite granite/granodiorite hybrid. |
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. |
891 |
Granito delle Alpi, from the Alps |
Fine to medium-grained granite showing a streaky texture; with pink perthitic potash-feldspar and white plagioclase. |
832 |
Granito rosso antico minuto, from between Aswan and Shellal District, Nile Valley, Egypt |
Fine-grained hornblende biotite granite. |
831 |
Granito rosso antico minuto, from between Aswan and Shellal District, Nile Valley, Egypt |
Fine-grained hornblende biotite muscovite granite. |
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. |
994 |
Granito antico, locality unknown |
Fine-grained hornblende biotite rapakivi granite with large pink perthitic phenocrysts of potash feldspar rimmed with colourless plagioclase. |
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. |
839 |
Granito rosso antico, sienite, from between Aswan and Shellal District, Nile Valley, Egypt |
Coarse-grained biotite granite with megacrysts of salmon K-felspar. |
840 |
Granito rosso antico, sienite, from between Aswan and Shellal District, Nile Valley, Egypt |
Coarse-grained biotite granite with megacrysts of salmon K-felspar. |
988 |
Granito antico, locality unknown |
Coarse-grained hornblende biotite granite with large megacrysts of salmon pink potash feldspar. |
997 |
Granito di Firenze, from Florence, Tuscany, Italy |
Hornblende biotite granite, porphyritic, with large megacrysts of potassium feldspar. |
860 |
Granito delle Alpi, from the Alps |
Coarse, cataclastic granite with recrystallised quartz and rare altered mica showing kink bands. |
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. |
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. |
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. |
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. |
869 |
Corsican granite, granito di Corsica, from Corsica, France |
Monzonite. Anhedral pink potash feldspar, greenish altered plagioclase and interstitial green amphibole. |
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. |
670 |
Obsidian, locality unknown |
Obsidian. Black glassy rock speckled with round white amygdales or spherulites. |
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. |
668 |
Selce di Roma, from the Capo di Bove, Rome, Lazio, Italy |
Altered phonolitic lava, with a few porphyric leucite and biotite crystals. |