Corsi Collection of Decorative Stones

Page 5 of 10, showing 401 - 500 of 1000 stones.
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OUMNH number Name and quarry location Geological description
OUMNH number Name and quarry location Geological description
520stone 520 Giallo di Mizzolle, from Mizolle, Val Pantena, Verona, Veneto, Italy Micritic limestone with abundant yellow rhombic microcrystals of calcite. It has spar-filled fractures and scattered dendritic manganese oxides.
519stone 519 Pietra paesina, from the province of Naples, Campania, Italy Micritic limestone or calcareous marl. Calcite-filled microfractures control iron-staining which together with Liesegang rings of colour, gives the 'paesina' effect. Some dendritic manganese oxides are evident.
531stone 531 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation. Calcite-filled microfractures control iron-staining. It is cut by a large calcite-filled vein.
534stone 534 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Micritic limestone or calcareous marl from the Cretaceous-Eocene Alberese Formation. Brown ferruginous calcite or siderite-filled veins cut the specimen and there is some pink coloration constrained by calcite-filled microfractures giving a faint 'paesina' effect.
533stone 533 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Micritic limestone or calcareous marl from the Cretaceous-Eocene Alberese Formation. Liesegang rings of iron-staining colour the specimen.
524stone 524 landscape marble, alberese di Ponte a Rignano, from Ponte a Rignano, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation, showing well-developed dendrites of manganese oxides.
529stone 529 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation. Calcite-filled microfractures control iron-staining. Some dendritic Mn oxides emanate from the fractures.
530stone 530 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation. Calcite-filled microfractures control iron-staining. Some dendritic Mn oxides emanate from the fractures.
532stone 532 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation. It is heavily iron-stained, the coloration constrained by abundant calcite-filled microfractures. Manganese oxide dendrite are also abundant.
528stone 528 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Micritic limestone or calcareous marl from the Cretaceous-Eocene Alberese Formation. Calcite-filled microfractures control iron-staining, giving the 'paesina' effect. Minor dendritic manganese oxides emanate from the fractures.
508stone 508 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Micritic limestone or calcareous marl from the Cretaceous-Eocene Alberese Formation. Calcite-filled microfractures control iron-staining. Some dendritic manganese oxides emanate from the fractures.
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.
523stone 523 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation, showing minor fracture constrained iron-staining, and areas of dendritic manganese oxides.
522stone 522 Pietra felce dell'Elba, pietra paesina, from the island of Elba, Livorno, Tuscany, Micritic limestone or calcareous marl showing minor fracture constrained iron-staining giving faint paesina effect. It has abundant areas of dendritic manganese oxides.
507stone 507 Pietra paesina, from Florence, Tuscany, Italy; and most probably from Valdarno Micritic limestone or calcareous marl from the Cretaceous Alberese Formation, with red hematitic specks and stylolites. Calcite-filled microfractures control iron-staining. Some dendritic Mn oxides emanate from the fractures.
537stone 537 Diaspro tenero di Sicilia, pietra topografica di Taormina, from Taormina, Messina, Sicily, Italy Micritic limestone or marl with diagenetic colouring. Veins and fractures are filled with calcite.
548stone 548 Lumachella di San Vitale, from the province of Verona, Veneto, Italy Not Gypsum. A Lower Jurassic limestone; matrix is fossiliferous micrite/microspar with molluscan debris. The large white intraclasts are heavily recrystallised shells of 'Lithiotis' bivalves. It has abundant stylolites.
526stone 526 Breccia di Modena, from Modena, Emilia-Romagna, Italy Micrite/microsparite limestone with abundant bioclasts, extensively bioturbated, fractured and stylolitised. Dendritic iron and manganese oxides are developed along stylolites.
525stone 525 Breccia di Modena, from Modena, Emilia-Romagna, Italy Micrite/microsparite limestone with abundant bioclasts, extensively fractured and stylolitised. Dendritic iron and manganese oxides are developed along stylolites.
536stone 536 Diaspro tenero di Sicilia, tigrato di Trapani, from Custonaci, Trapani, Sicily, Italy Micritic or microsparite limestone containing a mass of Teredo or similar wood-boring bivalves; no evidence of the wood itself remeins.
218stone 218 Lumachella antica, occhio di pavone bianco, perhaps from Verona, Veneto, Italy Limestone; a fossiliferous micrite/microsparite crowded with recrystallised bivalve debris.
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.
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.
165stone 165 Diaspro tenero di Sicilia, libeccio, from Castronuovo di Sicilia, Palermo, Sicily, Italy Limestone, perhaps resedimented; micrite/microsparite crowded with tiny bio/intraclasts and showing traces of grading in places. Note extensive solution seams, stylolites and calcite-filled fractures.
494stone 494 Breccia di Napoli, from Naples, Campania, Italy Micritic limestone with pale grey dolomite nodules; calcite-filled fractures, and disseminated dendritic pyrolusite. Brown is filler.
198stone 198 Occhiadina di Bergamo, from Bergamo, Lombardy, Italy Birds-eye limestone; probably originally a peloidal micrite.
280stone 280 Stellaria bianca di Verona, from Verona, Veneto, Italy Fossil wood with borings of the shipworms (teredinid bivalves), borings filled with white fossiliferous micritic limestone or spar. Alveoliria forams are present in sediment fills.
291stone 291 A hybrid of mischio scuro di Lugo/lumachella di San Vitale and astracane di Verona, from Lugo di Grezzana, Val Pantena, Verona, Veneto, Italy Limestone; a fossiliferous micrite parts of the specimen rich in bivalve fragments, and other parts containing elongate spar-filled sections of the the lower Jurassic 'Lithiotis' bivalve. It is crossed by a thick calcite-filled vein.
239stone 239 Lumachella di San Vitale, from Pigozzo, Val Squaranto; Verona, Veneto, Italy Fossiliferous microsparite limestone, the matrix rich in bioclasts. Large, fragmentary bivalves are the reef-forming bivalve Lithiotis. They are recrystallised/replaced by sparry calcite, but original calcite shells survive in places.
241stone 241 Occhiadino di Como, from Como, Lombardy, Italy Limestone. A bioturbated fossiliferous microsparite with abundant oncolites, and mollusc, foram and echinoderm debris. It has prominent spar-filled fractures.
233stone 233 Most probably Chiampo, from Vicenza or Venezia, Veneto, Italy Fossiliferous microsparite limestone with bivalves and abundant large and small benthic foraminifera. It has limestone intraclasts, calcite-filled veins, and stylolites coloured by red filler or polishing compound.
512stone 512 Argilla antica, locality unknown Most probably a calcareous mudstone, it contains planktonic forams.
238stone 238 Lumachella di Ticino, from Ticino, Lombardy, Italy Limestone; a fossiliferous nodular peloidal biomicrite, in places a biopelsparite, with large, spar-replaced gastropods and other molluscs. It has well-developed stylolites.
50stone 50 Mandolà di monte Baldo, from Monte Baldo, Verona, Veneto, Italy Nodular/burrowed bioclast-rich microsparite limestone with stylolites.
186stone 186 Rosso di Caprino Veronese, from Caprino Veronese, Verona, Veneto, Italy Limestone, probably of Cretaceous-Tertiary age; a burrowed nodular biomicrite crowded with skeletal grains. Note the extersitu stylolite development.
457stone 457 Griotte, from the Haute Pyrénées, France Devonian hematite-rich fine-grained nodular limestone with extensive stylolite development. White areas are calcite spar-filled goniatites
497stone 497 Rosso Verona, from Verona, Veneto, Italy Limestone from the Jurassic Rosso Ammonitico formation. A red nodular, micritic limestone with pervasive clay-coated solution seams.
466stone 466 Breccia del Largo di Garda, from Lake Garda, Lombardy, Italy Rosso ammonitico Middle-Upper Jurassic nodular pelagic limestone.
183stone 183 Marmo rosso di sant'Eligio, from Sant'Eligio, Verona, Veneto, Italy Nodular Jurassic-Cretaceous pelagic limestone, the colour leached along fractures and stylolites, which are spar-filled in places. Contains ammonites and a few patchy areas rich in other fossil debris.
463stone 463 Broccatello di Olorgie, from Olorgie, Verona, Veneto, Italy Rosso ammonitico Jurassic nodular pelagic limestone.
465stone 465 rosso di Grezzana, rosso Verona, from Grezzana, Val Pantena, Verona, Veneto, Italy Nodular pelagic limestone from the Jurassic rosso ammonitico formation.
498stone 498 Marmo marrone di Sestino, from Sestino, Milan, Lombardy, Italy; or from Verona, Veneto, Italy Most probably a resedimented nodular limestone with extensive solution seams and stylolites.
423stone 423 Oolite bianca e gialla di Monte Baldo, from Monte Baldo, and most probably from Punta San Vigilio, Verona, Veneto, Italy Oolitic limestone; oosparite with extensive yellow limonite in the matrix and cortex of the ooliths. Brown is filler/polishing compound.
424stone 424 Oolite bigia di Brescia, from Brescia, Lombardy, Italy Oolitic limestone; oosparite with abundant crinoid debris.
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.
58stone 58 Marmo carnagione di Perugia, perhaps from Monte Malbe, near Corciano, Perugia, Umbria, Italy. Pelagic limestone from the Upper Cretaceous to Eocene Scaglia Rossa Formation. A bioturbated fossiliferous biomicrite crowded with planktonic forams, calcispheres, and other small bioclasts. It is crossed by slender healed fractures, and stylolites.
57stone 57 Palombino rosso di Ancona, most probably from the area west of Ancona, in the eastern Apennines, Italy. Pelagic limestone from the Upper Cretaceous to Eocene Scaglia Rossa Formation. A bioturbated fossiliferous biomicrite with abundant tiny planktonic forams and calcispheres. Sparse slender calcite-filled fractures constrain the pink diagenetic colouring banding, analogous to the effect seen in pietra paesina.
68stone 68 ‘Marmo rosso di Taormina’; Taormina in Sicily is very doubtful. Possibly from the Apennines, Italy. Pink pelagic limestone, most probably from the Scaglia Rossa Formation (Cretaceous-Tertiary). A bioturbated fossiliferous biomicrite crowded with planktonic forams and calcispheres.
60stone 60 Marmo carnagione di Camerino; Camerino, Macerata, Marches, Italy may be the correct locality. A pink pelagic limestone from the Scaglia Rossa Formation (Upper Cretaceous-Eocene). It is a bioturbated biomicrite crowded with planktonic forams and calcispheres with some echinoderm and molluscan debris.
56stone 56 Marmo carnagione, marmo cannellino scuro, probably from the Umbria or Marches regions of the Apennines, Italy Pelagic limestone from the Upper Cretaceous to Eocene Scaglia Rossa Formation. A bioturbated fossiliferous biomicrite with abundant planktonic forams, calcispheres and other skeletal debris. It has calcite filled structures and stylolites, and pink coloration constrained by a slender calcite-cemented fracture ('paesina' effect).
59stone 59 Rossino degli Appennini, from the Apennines, Italy. Pelagic limestone from the Scaglia Rossa Formation (Upper Cretaceous-Eocene). A bioturbated fossiliferous biomicrite crowded with planktonic forams, calcispheres, and other skeletal debris. A set of close-spaced healed fractures constrain the pink coloration, giving the effect of a pietra paesina. Stylolites are also present.
499stone 499 Rosso di Mizzole, from Mizolle, Val Pantena, Verona, Veneto, Italy Burrowed nodular fossiliferous micritic pelagic limestone with calcite/clay-lined stylolites and solution seams. It is from the Jurassic Rosso Ammonitico Formation.
493stone 493 Probably mandolato di Grezzana, nembro rosato; from Grezzana, Verona, Veneto, Italy Pelagic limestone. A burrowed nodular fossiliferous micritic limestone with stylolites and solution seams, most probably of Upper Jurassic age, from the upper part of the Rosso Ammonitico Formation.
209stone 209 Broccatello di Camerino, from Camerino, Macerata, Marches, Italy Cretaceous-Eocene pelagic limestone, probably from the Scaglia Rossa Formation of the Apennines. A burrowed pink biomicrite with planktonic forams and calcispheres, cut by a sparry calcite and geopetal sediment-filled synsedimentary void, and by calcite-filled fractures.
55stone 55 Marmo carnagione, marmo cannellino chiaro, probably from the Umbria or Marches regions of the Apennines, Italy Pelagic limestone from the Scaglia Rossa Formation (Upper Cretaceous-Eocene), mottled grey with a rich fauna of foraminifera and other plankton.
274stone 274 Rosso di Castelletto di Brenzone, from Castelletto di Brenzone, Verona, Veneto, Italy Pelagic limestone from the Jurassic Rosso Ammonitico Formation. Fossiliferous micrite crowded with bioclastic debris including juvenile and adult ammonites. The aptychi of ammonites are conspicuous. Note the calcite-filled stylolites.
187stone 187 Cottanello, from Cottanello, Rieti, Lazio, Italy Cretaceous-Eocene pelagic limestone. A brecciated biomicrite with abundant planktonic forams and calcispheres. Calcite-filled fractures and voids are cut by late stage red clay-filled stylolites.
164stone 164 Diaspro tenero di Sicilia, libeccio, from Bisaquino, Palermo, Sicily, Italy Slumped green pelagic limestone with perhaps submarine cement infills of neptunian dykes. Note stylolites. Less fractures than the similar specimen no.171.
15stone 15 Marmo di Segni, from Segni, Rome, Lazio, Italy Sparsely peloidal/intraclastic fine-grained limestone (micrite or microspar) with calcite-filled vugs. The top surface shows the fenestral fabric of a birds-eye limestone.
181stone 181 Nembro di San Giorgio, from Verona, Veneto, Italy; but San Giorgio is doubtful. Peloidal/intraclastic limestone with fine grained micrite/microspar matrix, and with pervasive solution-seams.
272stone 272 Lumachella del Ticino, from Ticino, Lombardy, Italy Limestone; a fossiliferous pelsparite with echinoderm debris and algal nodules, and with incipient stylolites.
234stone 234 Lumachella di Menaggio, from Menaggio, Como, Lombardy, Italy, or more likely a lumachella from Verona or Vicenza, Veneto, Italy. Fossiliferous pel-sparite limestone. It has abundant peloids and intraclasts of micritic limestone in a sparry matrix. Some layers are rich in bivalves, others are edgewise breccia together with fragments of laminated 'algal' cyanobacterial micrite.
461stone 461 probably diaspro tenero di Sicilia, from Sicily, Italy; but may be breccia d'Arzo, from Ticino, Switzerland. Polymict limestone breccia with variable amounts of orange iron-staining of micritic matrix.
437stone 437 Broccatellone, from Verzirhan, Bilecik,Turkey Polymict limestone breccia with spar-filled cavities. Note suturing/dissolution at clast boundaries.
471stone 471 Breccia di Ponte Salaro, from Ponte Salaro, near. Rome, Lazio, Italy Polymict limestone conglomerate with abundant nummulites, molluscan and other skeletal debris. It is extensively stylolitised. The micritic matrix has a rich microfauna. It has large areas of yellowish filler and brown areas around clasts are also filler.
906stone 906 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece Partially recrystallised bioclastic limestone with crinoid and other debris, stylolites, and spar-filled fractures.
65stone 65 Duke's red marble, from Newhaven, Derbyshire, England Recrystallised limestone of Lower Carboniferous age, containing abundant hematitic (and occasional limonitic) capillary inclusions dispersed in colourless calcite.
80stone 80 Portasanta, from northwest of Chora, Island of Chíos, North Aegean, Greece Partially recrystallised fine-grained compact limestone. Red and yellow iron oxides are concentrated in abundant stylolites, giving a reticulated (net-like) appearance.
615stone 615 Serpentina delle Alpi, from the Alps (not confirmed) A heavily altered calcarenite.
197stone 197 Rosso del Ticino, from Ticino, Lombardy, Italy Ferruginous micaceous calcarenite.
185stone 185 Ceppo scuro del lago di Como, from Lake Como, Como, Lombardy, Italy Fine grained calcarenite with some primary lamination and signs of soft sediment deformation.
194stone 194 Marmo della Gaetta, from Gaetta, Lake Como, Como, Lombardy, Italy Heavily recrystallised and fractured ?calcarenite, with disseminated pyrite on fractures.
242stone 242 Lumachella di Abruzzo, from Scontrone, L'Aquila, Abruzzo, Italy Limestone. A fossiliferous calcarenite with calcite cement, probably of Tertiary or Quaternary age. It contains large calcite oysters and high-spired gastropods with the original aragonite shell preserved.
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.
518stone 518 Rosso di Fuligno, from Foligno, Perugia, Umbria, Italy Calcarenite, with no obvious biogenic grains. Patchy areas of pyrite, and scattered dendrites of manganese/iron oxides are present.
341stone 341 marmo rosa dell' Alcenago, from Alsenaso, Val Pantena, Verona, Veneto, Italy Not ‘alabaster’. A fine-grained calcarenite limestone.
290stone 290 Lumachella del Ticino, from Ticino, Lombardy, Italy Jurassic fossiliferous calcarenite with punctate brachiopods (Terebratulids) and ammonites.
277stone 277 Marmo conchigliare delle Alpi, from the Alps A calcarenite, probably of Tertiary age, with molluscan, algal, polychaete and other bioclasts, and common small benthic forams.
223stone 223 Lumachella antica, 'astracane dorato', from Henchir al Kasbat (the ancient Thuburbo Maius), Tunisia Fossiliferous limestone with abundant recrystallised/spar replaced bivalves and gastropods in a cream-coloured micrite and patchily calcarenite matrix.
269stone 269 Lumachella di Abruzzo, from Scontrone, L'Aquila, Abruzzo, Italy Tertiary or Quaternary fossiliferous calcarenite with oyster, heterodont bivalves, gastropods, echinoid spines and small benthic forams.
13stone 13 Palombino antico, possibly from the Apennines, Italy. Heavily recrystallised intraclastic limestone. The brown specks are polishing compound.
37stone 37 Broccatello di Siena, convent Siena, from Monte Arrenti near Sovicille, Siena, Italy Sheared limestone breccia with indications of soft sediment deformation fractures and extensive late-stage solution seams and stylolites.
480stone 480 Breccia di Val di Radi, breccia di Siena, from Valle di Radi, Siena, Tuscany, Italy Sheared micritic limestone with plastic deformation features, weakly metamorphosed.
86stone 86 Cipollino mandolato, griotte, from Haute Pyrénées, France; and probably from the Campan valley. Lower Devonian tectonised and sheared red nodular limestone, with stylolites and white calcite-filled veins.
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.
777stone 777 Sicilian jasper, diaspro di Coltobarro, perhaps diaspro di Caltavutura, from Coltabarro is perhaps Caltavutura, Palermo, Sicily, Italy Green silicified ?limestone, fracture and cavity boundaries altered to hematite, lined with calcite crystals and infilled with colourless crystalline quartz.
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.
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.
775stone 775 Sicilian jasper, diaspro di Cassaro, probably from Monte Cassero, Castronovo di Sicilia, Palermo, Sicily, Italy A heavily fractured silicified limestone, yellow jaspery areas containing a few mollusc shells. Fractures are filled with colourless crystalline quartz. Reddish-brown veins contain filler.
48stone 48 Marmo giallo di Mizolle, from Mizolle, Val Pantena, Verona, Veneto, Italy Sparry yellow limestone with scattered rhombohedral crystals of calcite, and with intraclasts of white fine-grained limestone. Dark coloured speckling is pyrite and wax filler.
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.
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.
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.
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.
485stone 485 breccia rossa Appenninica, from between Biassa and Pegazzano, La Spezia, Liguria, Italy Burrowed stylolitised nodular limestone which has been tectonically modified.
428stone 428 Mandolato di Lubiara, nembro rosato, from Lubiara, Caprino Veronese, Verona, Veneto, Italy Upper Jurassic or Cretaceous burrowed nodular biomicrite limestone crowded with skeletal grains. Note the extersitu stylolite development.
110stone 110 Africano, from Sigacik (ancient Teos), Izmir Province, Turkey Cretaceous tectonic breccia of poorly sorted limestone clasts, with stylolites and calcite-filled fractures
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.
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.
138stone 138 Giallo tigrato, from Monte Calvo, Rieti, Lazio, Italy Fine-grained calcite with spar-filled stylolites, fractures and cavities, and with extensive development of dendritic black iron/manganese oxides.
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