Corsi Collection of Decorative Stones

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OUMNH number Name and quarry location Geological description
OUMNH number Name and quarry location Geological description
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.
982stone 982 Sicilian jasper, diaspro di Sicilia, from Sicily, Italy Brecciated yellow-brown jasper, agate-filled fractures and matrix, voids filled with crystalline quartz.
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.
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.
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.
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.
975stone 975 most probably breccia Medici di Siena, from Siena, Tuscany, Italy Fine-grained calcite marble breccia; a sheared and metamorphosed limestone breccia.
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.
969stone 969 Breccia verde d'Egitto, breccia universale, from Wadi Hammamat, Eastern Desert, Egypt Metaconglomerate of metamorphic and igneous clasts (pink granite, banded tuff, serpentinite etc) in an epidotised matrix containing chlorite and abundant quartz grains. Cf no.679.
968stone 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.
963stone 963 Serpentina di Santa Caterina, from Santa Caterina, island of Elba, Livorno, Tuscany, Italy Serpentinite, finely brecciated and veined with calcite.
962stone 962 Verde antico, from Larissa, Thessaly, Greece Breccia with clasts mainly of serpentinite/ophicalcite, and a few of marble.
955stone 955 Fior di pesco Apuano, from Stazzema, near Seravezza, Lucca, Tuscany, Italy Heavily fractured calcite marble breccia; a sheared and tectonised limestone conglomerate.
954stone 954 Fior di pesco Apuano from Stazzema, near Seravezza, Lucca, Tuscany, Italy Marble breccia; a sheared and tectonised limestone conglomerate.
953stone 953 Breccia persichina, perhaps breccia Medicea, from Stazzema or Seravezza, Lucca, Tuscany, Italy Sheared, metamorphosed solution-modified limestone with stylolites, not entirely recrystallised to marble, fossils are still widely evident.
952stone 952 Breccia di Siena, from Siena, Tuscany, Italy Sheared polymict limestone conglomerate. The shearing may have been synsedimentary: Solution seams and stylolites are pervasive. Perhaps a sheared debris flow.
951stone 951 Breccia bigia, locality unknown Well-sorted polymict limestone conglomerate.
950stone 950 Breccia corallina, from Verzirhan, Bilecik,Turkey Tectonic brecciated limestone breccia, heavily fractured with stylolites and solution-modified clast boundaries.
949stone 949 Breccia Medicea or 'Africano', from Seravezza, Lucca, Tuscany, Italy Tectonised polymict breccia-conglomerate of limestone and marble clasts with solution-modified clast contacts.
948stone 948 Broccatellone, from Verzirhan, Bilecik,Turkey Tectonised limestone breccia-conglomerate.
947stone 947 Breccia di Settebasi, from Isle of Skyros, Sporades, Central Greece Sheared limestone conglomerate, metamorphosed to marble.
946stone 946 Breccia traccagnina, breccia Capitolina, locality unknown Polymict limestone conglomerate.
945stone 945 Breccia pavonazza bruna o dal suffragio, locality unknown Polymict breccia-conglomerate. Smaller clasts in matrix are realatively rounded and ferruginous reddish-brown, and all clasts are have ferruginous mainly stylolitic clast boundaries Voids are filled with sparry calcite. A few clasts contain bright green, 'fushsite' (chromium-bearing muscovite).
944stone 944 Breccia corallina, from Verzirhan, Bilecik,Turkey Weakly metamorphosed limestone breccia with stylolitised clast boundaries, and with small cavities filled with sparry calcite.
943stone 943 Breccia rossa, locality unknown Metamorphosed (tectonised) limestone breccia with calcite/hematite-filled fractures, solution seams and stylolites.
936stone 936 Alabastro antico, locality unknown Limestone breccia. Calcite travertine clasts, and a few gastropod shells, in a micritic (peloidal in places) matrix.
918stone 918 Pavonazzetto, from Iscehisar (Synnada), Afyonkarahisar Province, Turkey Sheared breccia of marble clasts.
917stone 917 Pavonazzetto, from Iscehisar (Synnada), Afyonkarahisar Province, Turkey Sheared marble breccia.
915stone 915 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Tectonic breccia-conglomerate of poorly-sorted limestone and metamorphic clasts, the latter rich in green iron silicates. The matrix is green, chlorite-rich.
914stone 914 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Tectonic breccia-conglomerate of poorly-sorted largely recrystallised limestone clasts in a sparry calcite matrix coloured dark brown by included ferruginous matter (oxidised chlorite). It has abundant stylolites, some are white, other iron-stained orange-brown. Fractures are filled with calcite.
913stone 913 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Tectonic breccia-conglomerate of poorly-sorted grey-brown biospar limestone clasts in a microspar matrix rich in red, brown and yellow ferruginous matter (oxidised chlorite). The same colours abundant stylolites. Cavities are filled with sparry calcite.
912stone 912 probably marmo Greco scritto, probably from Capo de Garde, Annaba (Hippo Regius), Algeria. A tectonised calcite marble, with fine and medium-grained graphite-rich bands; perhaps originally a marble breccia.
910stone 910 perhaps breccia corallina, from Verzirhan, Bilecik,Turkey Heavily sheared and recrystallised limestone breccia, almost entirely altered to fine-grained marble.
909stone 909 probably Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Sheared, recrystallised limestone breccia with some relic crinoid debris and abundant stylolites.
907stone 907 'Portasanta', locality unknown Sheared limestone/marble breccia with extensive stylolite development.
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.
903stone 903 Rosso antico brecciato, from Kiyi Kislacik, Milas, Mugla Province, Turkey Breccia of calcite marble clasts in a hematitic matrix.
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.
834stone 834 perhaps africano, from Locality unknown; if africano, then from Sigacik (ancient Teos), Izmir Province, Turkey A metamorphosed breccia of dark dolomitic? limestone containing bioclasts such as forams, echinoderm spines and perhaps crinoid ossicles. There are also scattered pyrite crystals and some reddish intraclasts. The matrix is coarsely crystalline pink calcite. There is some chlorite development around clasts. Note the iron-stained calcite-filled fracture.
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.
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
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.
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.
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.
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.
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.
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.
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.
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.
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.
759stone 759 Calcedonio di Volterra, Diaspro di Monterufoli, from Monterufoli, near Pomarance, Pisa, Tuscany, Italy Fractured, rounded jaspery clasts, haloes with banded colourless/ferruginous quartz, in a matrix of colourless granular dolomite.
758stone 758 Calcedonio di Volterra, Diaspro di Monterufoli, from Monterufoli, near Pomarance, Pisa, Tuscany, Italy Breccio conglomerate of siliceous jaspery clasts in a groundmass of partially silicified dolomitic limestone, cavities infilled with colourless to grey agate.
757stone 757 Diaspro di Barga, from Barga, Lucca, Tuscany, Italy A breccia of brown jaspery fragments in colourless crystalline quartz, in turn surrounded by white chalcedony, voids are filled with yellowish crystalline quartz.
756stone 756 Diaspro di Barga, from Barga, Lucca, Tuscany, Italy Milky white chalcedony with aggregates of red hematitic inclusions is cut by a rhombohedral network of fine calcite-filled fractures. Later chalcedony/colourless quartz replaces and is coloured by orange brown siderite. Secondary fractures are more sinuous and random. Dark brown areas are filler/polishing compound.
754stone 754 Calcedonio di Volterra, Diaspro di Monterufoli, from Monterufoli, near Pomarance, Pisa, Tuscany, Italy Off-white chert clasts in a partially silicified, partly calcite or more probably dolomite matrix.
752stone 752 'Diaspro delle Alpi', from the Alps (not confirmed) Breccia of white granular quartz and other clasts, many rimmed with muscovite, in a red ferruginous quartz matrix. Some fractures are filled with calcareous cemented sandstone. The whole rock is sheared and folded.
748stone 748 Diaspro della Tolfa, from Monti della Tolfa, near Civitavecchia, Rome, Lazio, Italy (not confirmed) Colourless fine-grained quartz with bands and scattered inclusions of pyrite. Brown areas are filler/polishing compound. Circular aggregates of quartz crystals visible on side of specimen resemble silicified coral.
747stone 747 Sicilian jasper, from Sicily, Italy Brecciated yellow jasper, heavily fractured, with chalcedony/agate-filled fractures and cement. Orange red 'veins' are artificial filler in open fractures.
746stone 746 Sicilian jasper, from Sicily, Italy Brecciated jasper; part red with colourless agate/crystalline quartz matrix, part yellow-brown with colourless crystalline quartz matrix. Later fractures are also filled with colourless quartz.
745stone 745 Sicilian jasper, most probably diaspro di Giuliana, from Sicily, Italy, and most probably from Giuliana, Palermo. Brecciated red jasper with rims of opaque white chalcedony. Colourless crystalline quartz matrix is iron-stained and vughy away from clasts. Clasts have colourless quartz-filled fractures.
744stone 744 Diaspro antico, locality unknown Brecciated jasper with black-speckled clasts, many with full or partial rims of opaque white chalcedony. Colourless/white/grey agate matrix has patchy yellow speckling, euhedral crystal inclusions of goethite, and minor late-stage crystalline quartz. No sardonyx is present.
742stone 742 almost certainly quarzo di Monterufoli, from Monterufoli, near Pomarance, Pisa, Tuscany, Italy Brecciated banded crystalline slightly smoky-amethystine quartz with some included euhedral black crystals, and aligned white 'feathers' of bubble inclusions. The reddish-brown bands are artificial filler in fracture cavities.
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.
740stone 740 Calcedonio di Volterra, Diaspro di Monterufoli, from Monterufoli, near Pomarance, Pisa, Tuscany, Italy Brecciated grey-white chalcedony, agate in part; many clasts have halos of yellow goethite banded with cream-coloured microcrystalline quartz, the latter present elsewhere as matrix.
739stone 739 Sicilian jasper, diaspro-agata di Milazzo, from Milazzo, Messina, Sicily, Italy Brecciated jasper; matrix forms faint agate halos around clasts, elsewhere it is colourless quartz. Single crystals may enclose many small clasts or fill a whole fracture.
738stone 738 Sicilian jasper, diaspro-agata di Giancavallo, from Feudo Giancavallo, near Bisaquino, Palermo, Sicily, Italy Brecciated jasper, clasts mainly yellow, in places altered grey-brown. Matrix of colourless crystalline quartz has some inclusions of iron sulphides on ghost faces. Agate is present as late stage infill within quartz matrix.
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.
736stone 736 Calcedonio di Volterra, Diaspro di Monterufoli, from Monterufoli, near Pomarance, Pisa, Tuscany, Italy Brecciated jasper; relatively unfractured large yellowish clasts, many with halos of yellow goethite banded with cream-coloured microcrystalline quartz. Matrix further away from clasts is colourless-milky agate.
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.
734stone 734 Sicilian jasper, diaspro-agata di Selinunte, from Selinunte, near Marinella, Trapani, Sicily, Italy Yellow brecciated jasper with chalcedony matrix, faintly agate banded in places with few translucent red/yellow bands. Note crystalline quartz-filled fractures contain layers of ?muscovite crystals.
733stone 733 Sicilian jasper, diaspro-agata di Cefalú, probably from Cefalà Diana or Bagni di Cefalà, Palermo, Sicily, Italy Yellow-brown brecciated jasper with narrow chalcedony-filled fractures and agate matrix, matrix voids filled with crystalline quartz. Pale speckled areas are filler.
732stone 732 Sicilian jasper, diaspro-agata di Monreale, from Monreale, Palermo, Sicily, Italy Brecciated brown jasper with matrix and fracture fills of colourless crystalline quartz.
731stone 731 Sicilian jasper, diaspro-agata di Giuliana, from Giuliana, Palermo, Sicily, Italy Brecciated brown jasper; agate matrix is patchy with hematitic inclusions in some bands; crystalline quartz fills voids. Buff-coloured areas are filler.
730stone 730 Agata del San Stefano, from Santo Stefano Quisquina, Agrigento Sicily, Italy; or more probably quarzo di Monterufoli, from Monterufoli, near Pomarance, Pisa, Tuscany, Italy Brecciated agate, colourless crystalline quartz cement with spherular limonitic inclusions. Agate-lined quartz-filled fractures.
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.
699stone 699 Pudingo delle Alpi, from the Alps Lithic breccia-conglomerate with siliceous clasts.
698stone 698 Pudingo delle Alpi, from the Alps Well-sorted quartz conglomerate with subsidiary lithic clasts.
697stone 697 Breccia di Roma, from Rome, Lazio, Italy Polymict conglomerate. Clasts are predominantly limestone, but some are dolomitic and some siliceous. The matrix is calcarenite. Some brown is goethite, but some is filler/polishing compound.
696stone 696 Breccia di Roma, from Rome, Lazio, Italy Calcarenite-polymict limestone conglomerate with clear spar matrix. Some darker grains are ?volcanic??, some is dendritic Mn; but also some is brown filler.
695stone 695 Breccia di Perugia, from Perugia, Umbria, Italy Polymict conglomerate with predominantly limestone clasts. Note sutured/styloliitised clast boundaries. Common larger benthic forams, scarcer calcareous algae. Creamy-yellow micritic matrix with microfossils.
694stone 694 Breccia di Roma, from Rome, Lazio, Italy Polymict conglomerate of predominantly limestone pebbles, with abundant green silicate grains in matrix. Green silicate grains are subhedral-euhedral crystals Well-rounded clasts have heavily altered rims. Matrix is white micrite/microcrystalline calcite. Note brown is filler.
693stone 693 Breccia di Roma, from Rome, Lazio, Italy Polymict conglomerate with extensively fractured clasts. These are predominantly limestone; a few are red in colour. Some show 'paesination' - microfracture constrained patterns of ironstaining like pietra paesina, and these also have a rich microfauna. The matrix is calcarenite.
692stone 692 Breccia di Roma, from Rome, Lazio, Italy Polymict conglomerate of diverse limestones and minor chert/chalcedony clasts, fairly well sorted and elongate with some alignment. Matrix is extensively spotted with Fe/Mn, with dendrites around rims of some clasts.
691stone 691 Breccia di Torrita, from Torrita Tiberina, near Rome, Lazio, Italy Polymict conglomerate of limestone pebbles, bordering on compact calcite travertine. The cement is calcarenite. There is extensive brown filler.
690stone 690 Breccia di Sicilia, from Sicily, Italy Conglomerate, with igneous clasts showing altered margins, in limestone matrix with well-preserved microfauna.
689stone 689 Breccia delle Alpi, from the Alps Polymict conglomerate with clasts of quartz, chert and silicified limestone.
688stone 688 Breccia delle Alpi, from the Alps Polymict conglomerate with clasts of quartz, chert and silicified limestone. There is extensive intergrowth suturing about some marble/limestone clasts.
687stone 687 Breccia delle Alpi, from the Alps; or perhaps Breccia di Seravezza, from Seravezza, Lucca, Tuscany, Italy Lithic breccio-conglomerate with clasts of dolomitic marble, schist, and other predominantly metamorphic rocks.
686stone 686 Breccia delle Alpi, from the Alps Poorly sorted quartz/quartzite conglomerate with subsidiary lithic clasts. It is silicified, note clay matrix and quartz veins.
685stone 685 Breccia delle Alpi, possibly from the Apuan Alps, Italy Lithic breccio-conglomerate with mainly siliceous clasts including quartz grains, but some of limestone and marble are also present. It is possibly from the Triassic Verrucano Formation.
684stone 684 Breccia delle Alpi, possibly from the Apuan Alps, Italy Polymict conglomerate; most clasts are silicified red limestone and rock crystal, a small proportion are calcareous or dolomitic. It is possibly from the Triassic Verrucano Formation.
683stone 683 'Traccagnina delle Alpi', perhaps from the province of Verona, Italy Breccia-conglomerate of sub-angular to rounded limestone, dolostone and occasional quartz clasts in a ferruginous sparite matrix. Clasts show extensive fracturing.
682stone 682 Pudingo antico, locality unknown Polymict conglomerate with clasts of quartz, chert, silicified limestone, and dolomitic limestone. The matrix is calcareous.
681stone 681 Pudingo antico, locality unknown Poorly sorted synsedimentary breccia/conglomerate. Red clasts are chert, containing igneous grains.
680stone 680 Breccia frutticolosa, from Bourdeau, Savoie, France Conglomerate of diverse limestone clasts. Clasts have been burrowed by marine bivalves. Matrix is calcareous sandstone with ferromagnesium silicate grains of volcanic origin.
679stone 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.
677stone 677 Basalte di Venezia, from Venice, Veneto, Italy 'Greenstone' - a brecciated metabasaltic tuff with calcite veins. Some clasts show weak graded bedding.
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.
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.
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.
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