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Mineral specimens search results for [ Calcite ]Page bottom

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XM2130NTB: Calcite (variety septarium)
Dark brown semicircular nodule formed by a marly rock matrix in which there is a radiating polygonal network filled with Calcite crystals with colors that vary from white to brown, some of them very dark brown. These formations are known as septaria (or septarian concretions). They have shrinkage cracks that originated from loss of water in a mass of clay group mineral gels with subsequent recrystallization. Comes from a well-known locality in the flysch facies of Deva, in Guipúzcoa, Spain. Today it is forbidden to collect this type of specimen as the locality has been declared an LIG (Site of Geological Interest) and only pieces from old collections, like this one, are available.
Deva, Municipio Deva, Comarca Bajo Deva, Guipúzcoa / Gipuzkoa, Basque Country (Euskadi)  Spain
Specimen size: 7.8 × 7.7 × 2.7 cm = 3.07” × 3.03” × 1.06”
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MJ12AM6: Calcite - melt - inclusion in Fluorapatite and with Fluorapatite
Spheroidal Calcite growths, translucent and of an intense red color, on matrix of a Fluorapatite crystal fragment. We will send the buyer the specimen in its original perky box from the Robert J. Noble collection, which also contains the label stating that the specimen was previously in the Frank Melanson collection.
Yates Mine, Otter Lake, Pontiac RCM, Outaouais, Québec  Canada
Specimen size: 2.7 × 2.7 × 2.4 cm = 1.06” × 1.06” × 0.94”

Main crystal size: 1.3 × 1.2 cm = 0.51” × 0.47”
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NM10AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 5.6 × 5.4 × 4 cm = 2.20” × 2.13” × 1.57”
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NC59AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 4.7 × 4 × 4.1 cm = 1.85” × 1.57” × 1.61”
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NA10AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 5.4 × 4.5 × 4.4 cm = 2.13” × 1.77” × 1.73”
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NK60AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 5.7 × 5 × 5 cm = 2.24” × 1.97” × 1.97”
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NN10AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 5.8 × 5.2 × 4.8 cm = 2.28” × 2.05” × 1.89”
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NL11AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 7.6 × 6 × 4.9 cm = 2.99” × 2.36” × 1.93”
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NG11AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 5.9 × 5 × 4.8 cm = 2.32” × 1.97” × 1.89”
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NJ11AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 5.4 × 4.9 × 4.8 cm = 2.13” × 1.93” × 1.89”
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NQ10AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 5.4 × 4.6 × 4.4 cm = 2.13” × 1.81” × 1.73”
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NE11AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 5.2 × 4.7 × 4.6 cm = 2.05” × 1.85” × 1.81”
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NF11AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 4.7 × 4.2 × 4 cm = 1.85” × 1.65” × 1.57”
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NP61AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 6 × 5.4 × 5.1 cm = 2.36” × 2.13” × 2.01”
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ND61AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 5.2 × 4.7 × 4.2 cm = 2.05” × 1.85” × 1.65”
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NB61AN2: Calcite after Gypsum
Rosette aggregate of Calcite pseudomorphs after Gypsum crystals, translucent, with a certain luster and a uniform creamy white color. The specimen comes from a recent find in an area where we were not previously aware of the presence of these curious pseudomorphs. A rarity.
De Los Cazadores Ravine, Rivas-Vaciamadrid, Comarca Área metropolitana de Madrid, Community of Madrid  Spain (09/2020)
Specimen size: 4.8 × 4.8 × 4.8 cm = 1.89” × 1.89” × 1.89”
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MF14AJ0: Calcite after Gypsum with Siderite
Floater group of twinned Gypsum crystals, white and bright, that are replaced by a white carbonate, very probably Calcite. A very original and interesting sample, very different from the usual at Cavnic.
Cavnic mining area, Cavnic, Maramures  Romania
Specimen size: 4.7 × 4.1 × 3.6 cm = 1.85” × 1.61” × 1.42”
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TXB69AQ0: Calcite and Calcite with Hematite inclusions
Very sharp Calcite crystal, with the dominant forms of an acute scalenohedron, between transparent and translucent, with very bright luster and reddish color due to Hematite inclusions. On matrix, with an earlier generation of small white Calcite crystals.
Fengjiashan Mine, Edong, Daye, Huangshi Prefecture, Hubei Province  China
Specimen size: 10.5 × 7.4 × 4 cm = 4.13” × 2.91” × 1.57”

Main crystal size: 4.7 × 2 cm = 1.85” × 0.79”
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MFF94AO1: Calcite coated by Hematite and Quartz
Two large, extraordinarily sharp, translucent, rhombohedral Calcite crystals with fine Hematite coatings that are in turn coated by very lustrous and completely colorless Quartz microcrystals. Extraordinary aesthetics.
Liangxi mining district, Datian, Sanming Prefecture, Fujian Province  China (±2014)
Specimen size: 12.4 × 9.8 × 7 cm = 4.88” × 3.86” × 2.76”
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TB37: Calcite doubly terminated
Aerial, with the two tips unbroken, and very well placed on the matrix. It also has good contrast between the matrix's colorless Calcite and the orangish main crystal. Esthetics!
Elmwood Mine, Carthage, Central Tennessee Ba-F-Pb-Zn District, Smith County, Tennessee  USA
Specimen size: 7 × 6.5 × 5.5 cm = 2.76” × 2.56” × 2.17”

Main crystal size: 5 × 2.6 cm = 1.97” × 1.02”
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JH14E5: Calcite doubly terminated
This one appeals to me because it is unusual. The Calcite crystals, which are very well defined, doubly terminated, and clear, appear to be randomly spread across the dark matrix.
Minerva I Mine, Ozark-Mahoning group, Cave-in-Rock Sub-District, Hardin County, Illinois  USA (±1980)
Specimen size: 8.8 × 6 × 6.5 cm = 3.46” × 2.36” × 2.56”
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11TP46: Calcite epitactic Rhodochrosite, Sphalerite, Pyrite
Rich group of Calcite crystals in epitactic growth on Rhodochrosite. The rhodochrosite acted as a substrate which controlled the shapes and orientations of the younger Calcite crystals. The specimen is completed by crystals of Sphalerite which form the matrix, and tiny crystals of Pyrite sprinkled between the white Calcite crystals.
Quiruvilca Mine (La Libertad Mine), Quiruvilca District, Santiago de Chuco Province, La Libertad Department  Peru (01-02/2016)
Specimen size: 6.8 × 4.2 × 4.5 cm = 2.68” × 1.65” × 1.77”

Main crystal size: 0.5 × 0.2 cm = 0.20” × 0.08”
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SE97AC7: Calcite on Aragonite and Sulfur
Aggregate of very flattened Aragonite crystals with their characteristic pseudohexagonal shape. The surfaces of their faces are coated by small Calcite crystals and they have deformed Sulfur crystals on the back. As is the case with so many specimens in this collection, in this case a great Italian classic, the sample is of great quality for the locality.
Cozzo Disi Mine, Casteltermini, Agrigento (Girgenti) Province, Sicily  Italy
Specimen size: 12.8 × 9.7 × 3.3 cm = 5.04” × 3.82” × 1.30”
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NC9F2: Calcite on Baryte
On a base of laminar Baryte there are two curious groups of Calcite crystals; they look like sprays and their gray color contrasts well with the white matrix.
Emilio Mine, 'zona intermedia', Obdulia vein, Caravia mining area, La Rubiera, Loroñe, Colunga, Comarca de la Sidra, Principality of Asturias (Asturias)  Spain (09-11/2004)
Specimen size: 9 × 8 × 4 cm = 3.54” × 3.15” × 1.57”

Main crystal size: 3.2 × 3 cm = 1.26” × 1.18”
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HM80NB: Calcite on Dolomite
Group of Calcite crystals, one of them clearly dominant, rounded, with scalenohedral and rhombohedral faces, transparent, lustrous, with a more yellow color than usual, and with Dolomite crystals.
La Florida mining area, Herrería-Valdáliga-Rionansa, Comarca Costa Occidental/Saja-Nansa, Cantabria  Spain
Specimen size: 7.9 × 3.9 × 2 cm = 3.11” × 1.54” × 0.79”

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