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
351stone 351 'Alabastro bianco d'Orte', probably Egyptian alabaster, Coarse to very coarse compact crystalline calcite, with a little banding suggesting this is a travertine.
364stone 364 'Alabastro di Sarzana', locality unknown; not thought to be from Sarzana. Banded compact travertine composed of medium-grained granular/prismatic calcite; some bands are orange, ferruginous. Dark brown is filler or polishing compound.
352stone 352 'Alabastro dorato d'Orte', locality unknown Coarse to very coarse nearly transparent granular calcite, perhaps a hydrothermal vein deposit rather than a travertine. Some grey micritic limestone matrix is present which contains white grains probably of algae.
309stone 309 'Alabastro fiorito', alabastro melleo, locality unknown Compact very finely banded calcite travertine. Some bands have brown ferruginous colouring.
305stone 305 'Alabastro fiorito', locality unknown Compact finely banded travertine composed of calcite, with abundant fractures perpendicular to the banding.
306stone 306 'Alabastro fiorito', locality unknown Compact finely banded travertine composed of calcite, some bands orange, ferruginous.
307stone 307 'Alabastro fiorito', locality unknown Compact medium- to fine grained banded travertine with some ferruginous staining.
308stone 308 'Alabastro fiorito', locality unknown Compact finely banded calcite travertine. A hot spring deposit with some bands containing dendritic iron oxides, probably the result of cyanobacterial activity.
310stone 310 'Alabastro fiorito', locality unknown Compact very fine to fine-grained banded calcite travertine.
558stone 558 'Arenaria di Corsica'; Corsica, France, is not confirmed. Impure medium-grained calcite marble, containing disseminated crystals of green chlorite and brown ferruginous matter which show a marked foliation.
509stone 509 'Argilla di Terni', from Terni, Umbria, Italy; or may be Tivoli, Roma, Lazio, Italy Burrowed micrite/microsparite limestone with abundant calcispheres and conspicuous dissolution fabrics (dark seams).
720stone 720 'Aventurine' (ferruginous sandstone), perhaps from Gebel Ahmar, Cairo or Gebels Gulab or Tingar, Aswan, all in the Nile Valley, Egypt Orthoquartzite; a poorly sorted coarse siliceous sandstone/fine conglomerate with goethite coating grains and a silica cement.
721stone 721 'Aventurine' (ferruginous sandstone), perhaps from Gebel Ahmar, Cairo or Gebels Gulab or Tingar, Aswan, all in the Nile Valley, Egypt Quartzite with a hematitic clay inclusions in the silica cement.
433stone 433 'Breccia di Brentonega di Dolce nel Veronese', from Dolce, Verona, Veneto, Italy, or from Brentónico, Trentino, Trentino-Alto Adige, Italy Jurassic ?syn-sedimentary breccia with micritic limestone clasts, sparry matrix, stylolites and spar-filled voids.
483stone 483 'Breccia traccagnina di Giazza', locality unknown; possibly the Verona area, Veneto, Italy Polymict limestone breccia-conglomerate with solution modified clast boudaries.
506stone 506 'Corso della mola di Sant'Ambrogio', from Sant' Ambrogio di Valpolicella, Verona, Veneto, Italy Recrystallised, probably originally bioturbated, micritic or microspar limestone with extensive stylolites and calcite filled fractures.
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.
760stone 760 'Diaspro delle Alpi', from the Alps Chert; a silicified limestone with abundant forams and other fossil debris.
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.
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.
878stone 878 'Granito delle Alpi', from the Alps Sandstone with abundant green siliceous clasts and with a calcareous cement.
899stone 899 'Granito di Napoli', locality unknown Pink granite gneiss, augen are recrystallised potash feldspar. The quartz is rather finely recrystallised.
863stone 863 'Granito di Perosa', from Perosa Argentina, Chisone valley, Turin, Piedmont, Italy Arkosic grit formed by weathering of quartz and feldspar-rich igneous or metamorphic rocks. Brownish red, well bedded; with scattered larger clasts of carbonate rock.
253stone 253 'Lumachella di Fuligno', almost certainly not from Foligno, Perugia, Umbria, Italy Fossiliferous biocalcarenite limestone with abundant recrystallised scleractinian coral, molluscan and other grains. Grain contacts are pervasively sutured. Note also stylolites and spar-filled fractures.
127stone 127 'Marmo bianco e nero d'Egitto', locality unknown Black fine-grained limestone with en echelon veins of white fibrous calcite, and with stylolites.
44stone 44 'Marmo giallo di Sentro', perhaps from Centro Tregnago, Verona, Veneto, Italy Brecciated fine-grained limestone with calcite-filled fractures; heavily stylolitised.
66stone 66 'Marmo rosso di Seravezza', possibly from Seravezza, Lucca, Tuscany, Italy but perhaps from Greece. Fine-grained hematitic calcite marble
500stone 500 'Persichino di Romegiano', from Domegiano or Romagnano, Verona, Veneto, Italy Fossiliferous micritic limestone with debris probably of bivalves.
807stone 807 'Porfido serpentino antico', locality unknown Grey porphyry, perhaps a porphyritic diorite or granodiorite with phenocrysts of white plagioclase.
83stone 83 'Portasanta', locality unknown Pink and grey coarse-grained marble; a metamorphosed limestone breccia with sutured clast boundaries and yellowish stylolites.
907stone 907 'Portasanta', locality unknown Sheared limestone/marble breccia with extensive stylolite development.
203stone 203 'Rosso di Terni', from the Apennines, Italy; Terni, Umbria, Italy. Cretaceous-Eocene pink pelagic limestone; probably from the Scaglia Rossa Formation of the Apennines. A bioturbated fossiliferous biomicrite crowded with planktonic forams, calcispheres and other skeletal debris. An early set of close-spaced healed fractures and stylolites is cut by a much larger scale set of calcite-filled fractures.
601stone 601 'Serpentina dell'Elba', from the island of Elba, Livorno, Tuscany, Italy Metaperidotite, mainly actinolite, but with minor opaque oxide, cut by greyish veins.
610stone 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.
617stone 617 'Serpentina dell'Elba', from the island of Elba, Livorno, Tuscany, Italy Heavily alterered ?peridotite/pyroxenite; now composed mainly of actinolite.
607stone 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.
583stone 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.
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.
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.
2stone 2 'Marmo porino', perhaps from the Island of Páros, Cyclades, South Aegean, Greece Medium-grained calcite marble.
101stone 101 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia-conglomerate of poorly sorted limestone clasts in a chlorite-bearing greenish matrix. It has calcite-filled veins, and crinoids and other fossil debris within the clasts.
102stone 102 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia-conglomerate of poorly sorted mixed limestone and green Fe-silicate bearing clasts in a variably iron-stained micritic matrix .
103stone 103 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia-conglomerate of poorly sorted limestone and limestone breccia clasts in a green chlorite/epidote-rich matrix, but with some characteristic black matrix also evident.
104stone 104 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia or conglomerate; this specimen is cut almost entirely from a single pink somewhat fractured clast which has abundant stylolites. Small areas of black matrix are evident.
105stone 105 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia or conglomerate of small limestone clasts in a black matrix.
106stone 106 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia or conglomerate of poorly sorted mixed limestone clasts in a green chlorite-rich matrix.
107stone 107 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia or conglomerate of poorly sorted limestone clasts in a black matrix. This specimen is crossed by white quartz veins.
108stone 108 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia or conglomerate of poorly sorted mixed limestone clasts in a green chlorite-rich matrix.
109stone 109 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia of poorly sorted mixed limestone clasts, some green and chlorite-rich, in a grey matrix.
110stone 110 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia of poorly sorted limestone clasts, with stylolites and calcite-filled fractures
111stone 111 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia with abundant crinoid and other fossil debris, in a dark grey matrix. The specimen is crossed by a white calcite vein.
112stone 112 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia or conglomerate of poorly sorted limestone clasts which have been partially oxidised.
113stone 113 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia or conglomerate of poorly sorted chlorite-rich limestone clasts, some with stylotised clast boundaries.
114stone 114 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia or conglomerate of poorly sorted limestone clasts. Note stylolites.
115stone 115 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia of pink somewhat fractured clasts in a black matrix. Note the calcite-filled vein following the clast margin.
116stone 116 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia with abundant crinoid and other fossil debris, in a dark grey, partly oxidised to brown, matrix.
117stone 117 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia or conglomerate of small limestone clasts in a chlorite-rich matrix crossed by stylolites.
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.
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.
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.
723stone 723 Agata bianca antica, locality unknown Part of a grey agate (colour banded quartz var. chalcedony) with an inner ‘core’ of quartz var. rock crystal, in turn enclosing pinkish chalcedony.
729stone 729 Agata del San Gottardo, from San Gottardo - perhaps St Gotthard, Ticino, Switzerland Chalcedony (cryptocrystalline quartz) - perhaps from a large chert pebble, jaspery towards rim.
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.
727stone 727 Agata delle Alpi, from the Alps Chalcedony (cryptocrystalline quartz) showing local small-scale cloudy agate-banding; heavily fractured, the fractures iron-stained.
728stone 728 Agata, locality unknown Chalcedony (cryptocrystalline quartz) with aligned pink jaspery inclusions showing a few relic fossils suggesting silicified limestone; and with scattered black dendrites and other small dark sulphide/oxide mineral inclusions. The stone has been sheared and fractured, the thin fractures filled with calcite.
370stone 370 Alabastra di Monte Alcino, from Montalcino, Siena, Tuscany, Italy A reddish brown very coarsely crystalline banded calcite travertine with ferruginous inclusions running parallel or perpendicular to banding.
321stone 321 Alabastro a giaccione, locality unknown Compact finely banded travertine composed of calcite, some bands with ferruginous inclusions. Note the extensive fracturing perpendicular to the banding.
322stone 322 Alabastro a giaccione, locality unknown Compact finely banded travertine composed of coarsely crystalline brown calcite coating a fossiliferous limestone. Note the abundant fractures.
320stone 320 Alabastro a giaccione, perhaps alabastro di Montalcino from Montalcino, Siena, Tuscany, Italy Compact banded travertine composed of very coarsely crystalline calcite. Ferruginous inclusions run parallel to the banding.
324stone 324 Alabastro a nuvole, locality unknown Medium to coarse-grained compact banded travertine with ferruginous orange and, in a few places, red colouring.
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.
927stone 927 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria, or perhaps alabastro ciliegino, locality unknown. Compact banded travertine composed of white fine-grained calcite, with coarse-grained areas patchily rich in iron oxides, mainly hematite.
326stone 326 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria. Compact banded travertine composed mainly of fine-grained calcite, with rich bushy developments of iron oxides, predominantly brown goethite, the result of cyanobacterial action in the hot spring water.
327stone 327 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria. Compact banded travertine composed mainly of fine-grained calcite, with rich bushy developments of iron oxides, predominantly red hematite, the result of cyanobacterial action in the hot spring water.
328stone 328 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria. Compact banded travertine composed mainly of fine-grained calcite, with bushy developments of iron oxides, predominantly red hematite, the result of cyanobacterial action in the hot spring water.
329stone 329 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria. Compact banded travertine now at least partially recrystallised. The dendritic development of iron oxides, predominantly red hematite, is most probably the result of cyanobacterial action in the hot spring water.
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.
331stone 331 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria. A recrystallised compact banded travertine composed of medium and coarse-grained granular calcite but retaining bushy developments of iron oxides, predominantly red hematite.
332stone 332 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria. Compact banded travertine composed of finely fibrous calcite almost entirely coloured red by hematite.
923stone 923 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria. Compact banded travertine composed mainly of calcite heavily tinted red by hematite.
924stone 924 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria. Compact banded travertine composed mainly of fine-grained calcite almost entirely coloured red by hematite, the result of cyanobacterial action in the hot spring water.
926stone 926 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria. Recrystallised compact banded travertine, composed of mainly granular ferruginous calcite.
929stone 929 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria. Compact banded travertine composed of coarse-grained calcite, some bands are rich in iron oxides, dendritic growth most evident on the sides of the sample.
932stone 932 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria. Very ferruginous compact banded calcite travertine.
934stone 934 Alabastro a pecorella, from Aïn Tekbalet district, Oran, Algeria. Compact banded calcite travertine coloured by iron oxide, with dendritic growths of manganese oxides.
314stone 314 Alabastro a rosa, alabastro fiorito, locality unknown Compact banded travertine composed mainly of calcite, in some bands as colourless prismatic crystals. It is richly coloured by iron oxides - red hematite and brown goethite, in places clearly bushy growths suggesting the action of cyanobacteria.
315stone 315 Alabastro a rosa, alabastro fiorito, most probably from the Pamukkale area, Denizli, Turkey Compact banded travertine composed mainly of calcite, in some bands as colourless prismatic crystals. It is richly coloured by iron oxides - red hematite and brown goethite, in places clearly bushy growths suggesting the action of cyanobacteria.
928stone 928 Alabastro a tartaruga, from Montauto, Castelfiorentino, Pisa, Tuscany, Italy Compact travertine composed of fine acicular calcite crystals.
354stone 354 Alabastro a tartaruga, from Montauto, Castelfiorentino, Pisa, Tuscany, Italy or perhaps Iano di Montaione, Florence, Tuscany, Italy Banded compact travertine, the very fine acicular calcite crystals giving a particularly compact structure. Note white 'fractures' appear to be strings of minute gas inclusions.
355stone 355 Alabastro a tartaruga, from Montauto, Castelfiorentino, Pisa, Tuscany, Italy or perhaps Iano di Montaione, Florence, Tuscany, Italy Banded compact travertine, composed of very fine acicular calcite crystals. Note white 'fractures' appear to be strings of minute gas inclusions.
356stone 356 Alabastro a tartaruga, from Montauto, Castelfiorentino, Pisa, Tuscany, Italy or perhaps Iano di Montaione, Florence, Tuscany, Italy Banded compact travertine, composed of very fine acicular calcite crystals. Note white 'fractures' appear to be strings of minute gas inclusions.
357stone 357 Alabastro a tartaruga, from Montauto, Castelfiorentino, Pisa, Tuscany, Italy or perhaps Iano di Montaione, Florence, Tuscany, Italy Very finely banded compact calcite travertine.
358stone 358 Alabastro a tartaruga, from Montauto, Castelfiorentino, Pisa, Tuscany, Italy or perhaps Iano di Montaione, Florence, Tuscany, Italy Compact travertine composed of fine acicular calcite crystals.
940stone 940 Alabastro a tartaruga, from Montauto, Castelfiorentino, Pisa, Tuscany, Italy or perhaps Iano di Montaione, Florence, Tuscany, Italy Compact travertine composed of very fine acicular calcite crystals.
935stone 935 Alabastro antico, alabastro verde, locality unknown Compact travertine composed of coarse-grained calcite.
931stone 931 Alabastro antico, locality unknown Compact banded calcite travertine, heavily contaminated with grains of the host limestone.
936stone 936 Alabastro antico, locality unknown Limestone breccia. Calcite travertine clasts, and a few gastropod shells, in a micritic (peloidal in places) matrix.
937stone 937 Alabastro antico, locality unknown Compact finely banded calcite travertine, wide paler coloured bands have a more porous texture and contain trapped filler.
345stone 345 Alabastro bianco di Collepardo, from Collepardo, Frosinone, Lazio, Italy Banded compact travertine composed of exceptionally coarse-grained columnar calcite.
333stone 333 Alabastro ciliegino, locality unknown Compact banded travertine composed mainly of fine-grained calcite. Iron oxides trapped within the botryoidal structure of the calcite give the distinctive appearance.
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