Corsi Collection of Decorative Stones

Page 2 of 10, showing 101 - 200 of 1000 stones.
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OUMNH number Name and quarry location Geological description
OUMNH number Name and quarry location Geological description
925stone 925 Alabastro ciliegino, locality unknown Compact banded travertine composed mainly of fine-grained calcite, with some bands particularly rich in included red hematite. Light brown areas are wax filler.
387stone 387 Alabastro de'Bagni di S. Filippo, from Bagni San Filippo, Siena, Tuscany, Italy Compact banded calcite travertine of very finely fibrous calcite.
388stone 388 Alabastro de'Bagni di S. Filippo, from Bagni San Filippo, Siena, Tuscany, Italy Compact banded calcite travertine; fluoresces yellow-white under longwave uv radiation.
361stone 361 Alabastro di Breschia, from Brescia, Lombardy, Italy Compact travertine composed of bands of finely fibrous and fine-grained calcite.
359stone 359 Alabastro di Busca, from Busca, Cuneo, Piedmont, Italy Banded compact calcite travertine. Note bands of granular white calcite. Specimen has a particularly high polish.
360stone 360 Alabastro di Busca, from Busca, Cuneo, Piedmont, Italy Banded compact calcite travertine. Note bands of granular white calcite.
350stone 350 Alabastro di Camerino, from Camerino, Ancona, Marches, Italy Compact banded travertine composed of very coarse, transparent, to very fine, translucent calcite.
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 .
369stone 369 Alabastro di Collepardo, alabastro ghiaccione, from Collepardo, near Frosinone; or from Capo Circeo, Latina, Lazio, Italy Very pure compact banded travertine composed of parallel prismatic colourless calcite crystals. A speleothem deposit.
340stone 340 Alabastro di Mizzole, gioia di Mizzole, from Mizolle, Val Pantena, Verona, Veneto, Italy Compact banded travertine composed of coarse-grained calcite.
362stone 362 Alabastro di Napoli, from Naples, Campania, Italy; or perhaps alabastro di Busca, from Busca, Cuneo, Piedmont, Italy Banded compact coarse-grained travertine, with bands of white granular calcite.
339stone 339 Alabastro di Palermo, from Palermo, Sicily, Italy Coarse-grained calcite travertine deposit on a bioclastic limestone. Matrix is a calc-rudite-limestone conglomerate dominated by large benthic forams and limestone intraclasts of calcareous algae. Note the stylolites.
938stone 938 Alabastro di Palestrina, from Palestrina, Rome, Lazio, Italy Compact banded travertine composed of acicular calcite crystals, with a ferruginous micritic infill between grains. Cavities in the surface are filled with brown wax, intensifying the colour a little.
311stone 311 Alabastro di Palombara, possibly from Iano di Montaione, Siena, Tuscany, Italy, but more probably Pamukkale, Denizli, Turkey Compact finely banded travertine composed mainly of fine-grained rather opaque white calcite. Bushy dendritic growths of brown iron oxides result from cyanobacterial activity.
347stone 347 Alabastro di Perugia; Perugia, Umbria, Italy, may not be correct. Very compact banded travertine composed of finely acicular/granular calcite crystals. Yellow areas are artificial filler.
349stone 349 Alabastro di Pierosara, from Pierosara, near Fabriano, Ancona, Marches, Italy Compact travertine composed of coarse columnar calcite.
346stone 346 Alabastro di Pisa, probably Alabastro di Volterra, from Pisa, Tuscany, Italy, and very probably from the area around Volterra or Castellina Marittima. Fine-grained compact gypsum, the variety which geologists now call alabaster. A vein of fibrous gypsum crosses the side of the specimen.
367stone 367 Alabastro di S. Felicita, from Santa Felicita, Capo Circeo, Latina, Lazio, Italy Compact banded travertine composed of medium to coarse-grained columnar calcite crystals
939stone 939 Alabastro di S. Felicita, from Santa Felicita, Capo Circeo, Latina, Lazio, Italy A very coarse-grained compact banded calcite travertine, of a pale golden yellow colour.
374stone 374 Alabastro di Sabina, Alabastro ghiaccione, from Sabina, or from Capo Circeo, Latina, Lazio, Italy Very pure banded calcite travertine composed of very coarse granular colourless crystals and fine grained white calcite, banding evident in a few places. It is almost certainly a speleothem.
335stone 335 Alabastro di Sestri, from Sestri Ponente, Genoa, Liguria, Italy Iron-stained impure tufa with coatings of banded compact travertine composed of very fine fibrous crystals of calcite.
538stone 538 Alabastro di Siena, from Siena, Tuscany, Italy Banded yellow calcite, probably a compact banded travertine.
348stone 348 Alabastro di Siena; Siena, Tuscany, Italy, may not be correct. Very compact banded travertine composed of finely acicular/granular calcite crystals. Yellow areas are artificial filler.
363stone 363 Alabastro di Torrita, perhaps from either Torrita Tiberina, Roma, Lazio, Italy or Torrita di Siena, Siena, Tuscany, Italy Banded compact travertine of very fine fibrous calcite, flesh pink on sides of specimen.
365stone 365 Alabastro di Trento, from Trent, Trentino-Alto Adige, Italy; or perhaps travertino di Tivoli, from Tivoli, Roma, Lazio, Italy Banded travertine, ferruginous bushy growths are the result of cyanobacterial growth in the hot water. Banding and abundant cavities are clearly visible on the sides of the sample.
353stone 353 Alabastro eburneo d'Orte from Orte, Viterbo, Lazio, Italy A compact, fine-grained and finely banded, pure calcite travertine.
316stone 316 Alabastro fiorito, almost certainly from the Pamukkale area, Denizli, Turkey Medium-grained compact banded travertine composed mainly of calcite, in some bands as colourless prismatic crystals. It is coloured by iron oxides, the bushy dendritic growths probably generated by cyanobacterial action.
317stone 317 Alabastro fiorito, from Pamukkale area, Denizli, Turkey Medium-grained compact banded travertine composed mainly of calcite. It is coloured by iron oxides, the bushy dendritic growths probably generated by cyanobacterial action.
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.
318stone 318 Alabastro fiorito, most probably from the Pamukkale area, Denizli, Turkey Compact banded travertine composed of coarse acicular to granular calcite. The sides of the specimen show the banding clearly.
930stone 930 Alabastro fortezzino, probably from one of several quarries at Hatnub, Mallawi, and other locations in the Nile valley, Eastern desert, Egypt. Fine-grained compact travertine with some slender orange bands, hosted in a nummulitic limestone.
304stone 304 Alabastro ghiaccione, from Capo Circeo, Latina, Lazio, Italy Compact banded travertine composed of parallel columnar colourless crystals of calcite interbanded with fine grained white calcite.
343stone 343 Alabastro gioia del ponte di Vezia, from Verona, Veneto, Italy Compact travertine composed of very coarse columnar calcite. The surface has a particularly waxy surface indicating it may have been acid-etched.
319stone 319 Alabastro sardonico, locality unknown Compact banded travertine composed of coarsely crystalline calcite coloured red by hematite, adjoining or interbanded with colourless very coarsely crystalline calcite.
344stone 344 Alabastro scuro di Collepardo, from Collepardo, Frosinone, Lazio, Italy Banded compact travertine composed of very fine-grained, grading to coarse-grained, columnar calcite.
302stone 302 Alabastro, cotognino a onde, locality not known. Perhaps from Hatnub, Mallawi, or another location in the Nile valley, Eastern desert, Egypt. Compact banded travertine cut parallel to the banding, composed of medium-grained columnar/granular calcite, with a few scattered aggregates of acicular goethite or manganese oxide crystals. Some of the sparry limestone host rock is present. Grey patches contain clay and other debris. Small pink area is filler.
511stone 511 Alberese limestone, from Florence, Tuscany, Italy; and most probably from Valdarno Micritic limestone or calcareous marl from the Upper Cretaceous Alberese Formation. Fractures are calcite-filled.
704stone 704 Amazon stone, from Russia; most probably from Miass, Chelyabinsk Oblast. Amazonite or amazon stone, a variety of microcline feldspar.
712stone 712 Amethyst, locality unknown Amethyst, the purple variety of quartz, part of a vein or geode showing the typical colour zoning of the crystals described by Corsi.
557stone 557 Arenaria antica, locality unknown Originally a micritic limestone with indeterminate spar-filled ?brachiopods, this is now partly recrystallised.
559stone 559 Arenaria antica, locality unknown Coarse-grained biocalcarenite, with algal, foram, and molluscan grains dominant.
961stone 961 Arenaria antica, locality unknown Coarse-grained bio calcarenite, with algal, foram, molluscan grains dominant. Matrix is colourless calcite.
554stone 554 Arenaria di Brianza, from the Brianza area, Lombardy, Italy Fine-grained biocalcarenite with micritic/microspar matrix.
555stone 555 Arenaria di Siena, from Siena, Tuscany, Italy Bioclastic limestone with microspar matrix. It has white algal grains and spar-filled anastomising vugs, probably incipient birds-eyes.
556stone 556 Arenaria di Viggiù, from Viggiù, Varese, Lombardy, Italy Bioturbated fine biocalcarenite. The grains are predominantly echinoderm, probably crinoidal. It has solution seams/incipient stylolites.
512stone 512 Argilla antica, locality unknown Most probably a calcareous mudstone, it contains planktonic forams.
514stone 514 Argilla di Tivoli, from Tivoli, Roma, Lazio, Italy Brecciated fine-grained limestone. A fossiliferous biomicrite with scattered bioclasts (calcispheres or radiolaria). Fractures are calcite-filled.
72stone 72 Ashford black marble, Derbyshire black marble, from Arrock mine or from quarries on Sheldon Moor, near Ashford-in-the-Water, Derbyshire, England Bituminous fine-grained limestone of Carboniferous age.
248stone 248 Astracane di Verona, lumachella di Verona, lumachella Pernise, from Val Pernise, near Grezzana, Val Pantena, Verona, Veneto, Italy Limestone. A molluscan biosparite crowded with whole and fragmentary brachiopods (probably terebratulids) and bivalves, replaced by sparry calcite. A few gastropods are evident, and it has stylolites.
265stone 265 Astracane di Verona, lumachella di Verona, lumachella Pernise, from Val Pernise; near Grezzana, Verona, Veneto, Italy Limestone. A molluscan biosparite crowded with whole and fragmentary brachiopods (probably terebratulids) and bivalves, replaced by sparry calcite. A few gastropods are also present. A stylolite can be seen.
235stone 235 Astracane di Verona, lumachella di Verona, from Stalavena, Verona, Veneto, Italy A fossiliferous micrite/microsparite limestone with abundant recrystallised, predominantly brachiopod (probably terebratulid) debris.
224stone 224 Astracane di Verona, lumachella di Verona, from Verona, Veneto, Italy Limestone; a fossiliferous micrite/microsparite with abundant recrystallised brachiopod (probably terebratulid) and bivalve debris.
225stone 225 Astracane di Verona, lumachella di Verona, from Verona, Veneto, Italy Limestone. Fossiliferous biosparite with abundant recrystallised molluscs, mainly brachiopod (probably terebratulid) and bivalve debris, other bioclasts, and possible limestone intraclasts. It has stylolites and calcite-filled fractures.
245stone 245 Astracane di Verona, lumachella di Verona, from Verona, Veneto, Italy Fossiliferous limestone. The matrix is microspar/micrite; crowded with whole and fragmentary brachiopod (probably terebratulid) and bivalve debris, which is commonly recrystallised or replaced by sparry calcite.
264stone 264 Astracane di Verona, lumachella di Verona, from Verona, Veneto, Italy Limestone. A molluscan biosparite crowded with whole and fragmentary brachiopods (probably terebratulids) and bivalves, replaced by sparry calcite, and with a few scarce gastropods. Some stylolites are evident.
270stone 270 Astracane di Verona, lumachella di Verona, from Verona, Veneto, Italy Mesozoic fossiliferous burrowed micritic limestone with abundant bioclasts: whole and fragmentary terebratulid brachiopods, crinoid debris, small benthic forams, and calcareous algae. It has spar-filled fractures and stylolites.
256stone 256 Astracane di Verona, lumchella di Verona, from Verona, Veneto, Italy Limestone. Molluscan biosparite crowded with whole and fragmentary brachiopods (probably terebratulids) and bivalves which are replaced by sparry calcite. It contains a few gastropods and has stylolites.
722stone 722 Aventurine quartz, from Siberia, Russia; or possibly from Egypt Quartzite coloured by hematite and goethite, in places the grain coatings giving some aventurine effect.
151stone 151 Bardiglio fiorito, from the Apuan Alps, Tuscany, Italy Tectonite of fine- to medium-grained white or grey calcite marble fragments in black graphite-rich marble; crushed and folded.
149stone 149 Bardiglio, from Carrara, Massa e Carrara, Tuscany, Italy Sheared reticulated mass of fine-grained buff-coloured, and medium-grained, white calcite marble, grey graphite-rich in places.
156stone 156 Bardiglio, from Carrara, Massa e Carrara, Tuscany, Italy A folded sheared limestone breccia, now a calcite marble, some layers with either finely disseminated graphite or sulphide minerals. The grain-size of the calcite ranges from very coarse to fine.
157stone 157 Bardiglio, from Carrara, Massa e Carrara, Tuscany, Italy Deformed fine- to medium-grained calcite marble. Probably originally a breccia, now much stretched and flattened. Note the yellow ferruginous fill to stylolites.
160stone 160 Bardiglio, from Carrara, Massa e Carrara, Tuscany, Italy Fine to medium-grained marble with variable traces of graphite/sulphide minerals and showing some lamination and folding.
153stone 153 Bardiglio, from the Apuan Alps, Tuscany, Italy; very likely from Carrara, Massa e Carrara. Brecciated and veined fine-grained calcite marble, the veins of white calcite are in places iron-stained yellow.
154stone 154 Bardiglio, from the Apuan Alps, Tuscany, Italy; very likely from Carrara, Massa e Carrara. Fine-grained calcite marble with stylolites still clearly evident. The white areas are coarser-grained calcite.
676stone 676 Basalte antico, Bekhen-stone, from Wadi Hammamat, Eastern Desert, Egypt Most probably a metagreywacke, a metamorphosed turbidite deposit with sand to silt sized particles.
678stone 678 Basalte di Bolsena, from Bolsena, Viterbo, Lazio, Italy Metatuff with abundant quartz and hornblende crystals of varying size up to 2mm in a poorly sorted crystal-lithic matrix. Shows weakly defined flow-banding.
677stone 677 Basalte di Venezia, from Venice, Veneto, Italy 'Greenstone' - a brecciated metabasaltic tuff with calcite veins. Some clasts show weak graded bedding.
675stone 675 Basalte fiorita, locality unknown Serpentinised metabasalt with rounded aggregates of crystallites. Some small vesicles are filled with dark calcite.
674stone 674 Basalte listata, possibly from Wadi Hammamat, Eastern Desert, Egypt Most probably a metagreywacke, a metamorphosed turbidite deposit with sand to silt sized particles.
672stone 672 Basalte scura, very possibly from Wadi Hammamat, Eastern Desert, Egypt Most probably a metagreywacke, a metamorphosed turbidite deposit with sand to silt sized particles.
673stone 673 Basalte verde, locality unknown 'Greenstone' - a metabasalt or metabasaltic tuff flecked with iron-rich spots.
893stone 893 Baveno granite, rosa Baveno, from Baveno, Novara, Piedmont, Italy Coarse hornblende granite with pale pink perthitic potash-feldspar.
249stone 249 Belgian red marble, rouge royale, from Namur, Belgium Devonian fine-grained red burrowed limestone with calcite-filled stromatactis. It is rich in bioclasts. Fossils include articulate brachiopods, orthocone nautiloids, and echinoderm debris.
861stone 861 Beola di Milano, from Milan, Lombardy, Italy Mica schist.
130stone 130 Bianco e nero di Monte Pulciano, possibly from Montepulciano, Siena, Tuscany, Italy (see notes) Black limestone with white calcite-filled fractures and abundant stylolites. Stylolites and thin fractures contain yellow siderite.
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.
892stone 892 Bianco Montorfano, from Montorfano, Novara, Piedmont, Italy Hornblende biotite granite.
139stone 139 Bigio antico, bigio morato, from Sigacik (ancient Teos), Izmir Province, Turkey Graphitic medium-grained marble with abundant stylolites, showing relics perhaps of crinoidal debris? Specimen is waxed and polished.
141stone 141 Bigio antico, bigio morato, locality unknown Grey-brown bioturbated limestone with a few mollusc fragments. Note white coarse-grained spar-filled cavities and fractures, and abundant stylolites. The surface is waxed and polished.
140stone 140 Bigio antico, bigio morato, possibly from the Island of Chíos, North Aegean, Greece Partially recrystallised fine-grained limestone. Relics of corals/crinoids/bivalves are preserved. Note a few spar-filled fractures and stylolites.
147stone 147 Bigio antico, marmor Lesbium, from Moria, Island of Lesbos, North Aegean, Greece A very coarse-grained graphite-bearing calcite marble.
148stone 148 Bigio antico, marmor Lesbium, from Moria, Island of Lesbos, North Aegean, Greece A very coarse-grained graphite-bearing calcite marble.
142stone 142 Bigio antico, locality unknown Very coarse-grained marble with rounded white clasts and net-veined graphitic matrix.
143stone 143 Bigio antico, locality unknown A very coarse-grained marble with graphite-rich net-veining. Brown areas are filler/polishing compound.
146stone 146 Bigio antico, locality unknown A generally fine-grained marble with extensive development of microveins, alteration along some microveins affecting grain-size and colour. Note brown is filler/polishing compound.
145stone 145 Bigio antico, probably marmor Lesbium, most probably from Moria, Island of Lesbos, North Aegean, Greece Mylonitic marble. A coarse-grained lineated marble with patchy graphitic net-veins.
543stone 543 Blue John fluorite, from Castleton, Derbyshire, England Hydrothermal vein deposit of colour-zoned purple-blue/colourless fluorite, the variety known as Blue John.
237stone 237 Botticino fiorito, from Botticino, Brescia, Lombardy, Italy Limestone; a fossiliferous micrite with calcareous algae.
951stone 951 Breccia bigia, locality unknown Well-sorted polymict limestone conglomerate.
399stone 399 Breccia corallina giallastra from Verzirhan, Bilecik,Turkey or breccia Godoy Polymict limestone conglomerate. Clast boundaries and contacts sutured. Note stylolites and extensive calcite-filled fractures.
404stone 404 Breccia corallina, from Verzirhan, Bilecik,Turkey Limestone breccia with extensive solution-modified stylolitic clast contacts, and calcite-filled fractures/veins.
944stone 944 Breccia corallina, from Verzirhan, Bilecik,Turkey Weakly metamorphosed limestone breccia with stylolitised clast boundaries, and with small cavities filled with sparry calcite.
950stone 950 Breccia corallina, from Verzirhan, Bilecik,Turkey Tectonic brecciated limestone breccia, heavily fractured with stylolites and solution-modified clast boundaries.
207stone 207 Breccia de' Gherardeschi, perhaps from Tuscany, Italy Limestone. A bio-pel micrite crowded with small intraclasts and shell debris. Anastomosing white material is calcite-replaced scleractinian coral. Note the extensive development of stylolites.
460stone 460 Breccia de'Colli Euganei, probably from Verona or Vicenza regions, Veneto Italy Brecciated limestone with pervasive stylolites.
468stone 468 Breccia degli Appennini, from Apennines, Italy Limestone. A debris-flow deposit of bio- and intraclast-rich biomicrite. Stylolites and manganese oxide dendrites are present.
469stone 469 Breccia degli Appennini, from Apennines, Italy Matrix-supported bio- and intraclast-rich biomicrite limestone. It is poorly sorted; possibly resedimented in a debris flow.
470stone 470 Breccia degli Appennini, from Apennines, Italy Bioturbated fossiliferous biomicrite limestone. A packstone (grain-supported, the bioclasts in contact). It has fractures and stylolites.
489stone 489 Breccia degli Appennini, from the Apennines, Italy Deformed granitoid; porphyroblasts are quartz dominantly, perhaps originally vein quartz, now disrupted.
Page 2 of 10, showing 101 - 200 of 1000 stones.
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