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
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.
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.
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.
681stone 681 Pudingo antico, locality unknown Poorly sorted synsedimentary breccia/conglomerate. Red clasts are chert, containing igneous grains.
699stone 699 Pudingo delle Alpi, from the Alps Lithic breccia-conglomerate with siliceous clasts.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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
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.
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.
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.
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.
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.
982stone 982 Sicilian jasper, diaspro di Sicilia, from Sicily, Italy Brecciated yellow-brown jasper, agate-filled fractures and matrix, voids filled with crystalline quartz.
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.
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.
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.
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.
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.
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.
571stone 571 Serpentina verde di Susa, from Val di Susa, Turin, Piedmont, Italy Serpentinite veined with fine-grained grey calcite.
573stone 573 Serpentina verde di Calabria, from Calabria, Italy Brecciated serpentinite.
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.
421stone 421 Breccia della villa Adriana, breccia Quintilina, most probably from Levanto, Liguria, Italy Serpentinite breccia.
489stone 489 Breccia degli Appennini, from the Apennines, Italy Deformed granitoid; porphyroblasts are quartz dominantly, perhaps originally vein quartz, now disrupted.
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.
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.
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.
698stone 698 Pudingo delle Alpi, from the Alps Well-sorted quartz conglomerate with subsidiary lithic clasts.
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.
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.
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.
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.
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.
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.
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.
196stone 196 Fior di persico, from Seravezza, Lucca, Tuscany, Italy Marble; a tectonised and sheared limestone breccia-conglomerate.
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.
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.
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.
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.
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.
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.
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.
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.
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.
205stone 205 Fior di pesco (fior di persico), from Eretria, Euboea, Central Greece Triassic tectonite. A sheared marble breccia with late-stage calcite-filled veins and fractures
330stone 330 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria. This appears to be a recrystallised brecciated compact banded travertine, composed of medium and coarse-grained granular calcite. It is coloured red by disseminated hematite.
371stone 371 Alabastro di Civitavecchia, from Civitavecchia, Rome, Lazio, Italy Breccia of travertine clasts, peloids, algal debris and fine-grained ferruginous detritus in a sparite matrix .
303stone 303 Alabastro a occhi, locality unknown Brecciated fine-grained compact banded travertine, with acicular and granular bands of calcite, some dark orange-brown coloured.
301stone 301 Alabastro fiorito, most probably from the Pamukkale area, Denizli, Turkey Compact banded travertine, brecciated in places, composed of fine- to medium-grained calcite with some orange-brown ferruginous bands. Abundant cavities contain greyish brown wax filler.
96stone 96 Cipollino rosso, from Kiyi Kislacik, Milas, Mugla Province, Turkey Fine to medium-grained folded impure limestone, now weakly metamorphosed to marble but the abundant debris suggesting it was in part a calcarenite.
944stone 944 Breccia corallina, from Verzirhan, Bilecik,Turkey Weakly metamorphosed limestone breccia with stylolitised clast boundaries, and with small cavities filled with sparry calcite.
251stone 251 Travertino di Monte Catini, from Montecatini Terme, Pistoia, Tuscany, Italy Limestone, brown ferruginous in places, composed of brecciated travertine, algal fragments and other bioclasts. Cavities are mostly filled with sparry calcite.
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.
936stone 936 Alabastro antico, locality unknown Limestone breccia. Calcite travertine clasts, and a few gastropod shells, in a micritic (peloidal in places) matrix.
441stone 441 Breccia del lago di Como, from Lake Como, Como, Lombardy, Italy Peloidal limestone breccia. The matrix is pale brown transparent calcite, as compact banded travertine in places. Note extensive brown filler/polishing compound.
396stone 396 Breccia traccagnina, locality unknown Polymict limestone conglomerate with solution-modified sutured clast boundaries and stylolites.
394stone 394 Breccia di Aleppo, from Island of Chíos, North Aegean, Greece Polymict limestone conglomerate with solution-modified clast boundaries and stylolites.
950stone 950 Breccia corallina, from Verzirhan, Bilecik,Turkey Tectonic brecciated limestone breccia, heavily fractured with stylolites and solution-modified clast boundaries.
169stone 169 Diaspro tenero di Sicilia, from Taormina, Messina, Sicily, Italy Re-sedimented limestone of the Rosso Ammonitico Formation. It is heavily stylolitised, and the colour is diagenetic.
407stone 407 Griotte, from the Haute Pyrénées, France Lower Devonian red nodular limestone, clay-rich matrix, with extensive solution seams and stylolites
166stone 166 Diaspro tenero di Sicilia, libeccio, from Feudo Lalia, Alia, Palermo, Sicily, Italy Heavily fractured stylolitised birds-eye limestone with extensive fenestral fabric (calcite-filled vugs). Matrix is fossiliferous peloidal micrite/microspar.
129stone 129 Bianco e nero di Portoferraio, from Portoferraio, island of Elba, Livorno, Tuscany, Italy Black limestone breccia with white calcite-filled veins and fractures, some en echelon and fibrous in places. Abundant stylolites and thin fractures are filled with yellow siderite.
110stone 110 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia of poorly sorted limestone clasts, with stylolites and calcite-filled fractures
485stone 485 breccia rossa Appenninica, from between Biassa and Pegazzano, La Spezia, Liguria, Italy Burrowed stylolitised nodular limestone which has been tectonically modified.
136stone 136 most probably giallo e nero di Carrara, from Carrara, Massa e Carrara, Tuscany, Italy Very poorly sorted breccia of black fine-grained weakly metamorphosed limestone in a white calcareous matrix; most of the stone is one larger clast which is crossed with white and ferruginous yellow veins. Note the yellow stylolites and stylolitic clast boundary.
132stone 132 most probably giallo e nero di Carrara, from Carrara, Massa e Carrara, Tuscany, Italy Finely brecciated weakly metamorphosed fine-grained limestone with veins of saccharoidal to fibrous calcite; some veins and stylolites coloured yellow by included goethite.
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.
161stone 161 Diaspro tenero di Sicilia, libeccio, from Gibellina Vecchia, Trapani, Sicily, Italy Recrystallised limestone; originally probably a noular micrite/microspar, voids filled by sparry calcite. Buff-coloured area 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.
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.
473stone 473 Breccia di Monsumano, from Monsummano Terme, Pistoia, Tuscany, Italy Slumped/sheared limestone breccia with calcite-filled fractures and with small amounts of manganese oxides as dendrites and stylolites.
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