Calcite 'Twin' Mineral Specimen.

A group of thirteen mineral specimens, including one jointed twin geode, one septarian nodule from Utah with a yellow calcite centre, brown aragonite or siderite lines, and limestone encasing, one Ger

Rare amazing natural piece on custom stand 18"; 25 pounds 54 Kg

DescriptionMaterials: celestine, calciteBlue Celestine Crystals With Calcite Mineral Specimen From Baghdis, AfghanistanWeight: 85.25 CaratsSize : 38*26*17 mmOrigin : Baghdis, AfghanistanTreatment : Na

Materials: Terminated Celestine with Calcite 5 Grams Very Beautiful Terminated Celestine with Calcite mineral Specimen From Afghanistan Size 2 CM X 1.4 CM X 1.6 CM Reserve: $75.00 Shipping: Domestic:

Pyrite or fool's gold cluster on a calcite matrix mineral specimen, together with a lucite stand with four fitted brass arms. 4.5" H x 4" W x 3.5" D on stand.

A rectangular pale-blue calcite crystal; supplied in a display case with old collector's identification label. 11.4 grams total, 19mm (box: 34 x 40 x 35mm) (3/4 (1 1/4 x 1 1/2 x 1 1/2)"). From the his

A rare orthoclase 'cross twin' in granite. 275 grams, 10cm (4"). Ex Dr M. G. 'Sam' Weller, MBE, collection, Cornwall, UK; from Lamorna Quarry, Cornwall, UK, supplied with Dr Weller's personal collecti

A group of ten optical calcite specimens, each held in a white card collector's tray. 170 grams total, 18-22 mm (5/8 - 7/8 in.) Durango, Mexico. Mineral Imports, London, UK. Gregory, Bottley & Lloyd (

A fine specimen of a finely cut block of orange calcite, in white card tray with label reading: 'Calcite, Mexico'. 20 grams, 26mm (1"). From a historic ‘Victorian Museum’ collection; from the stoc

A fine specimen of a deep purple amethyst crystals on a matrix, with smaller calcite crystals overgrown to the centre and one corner; in white card tray. 382 grams, 10.2cm (4"). From a historic ‘Vic

A fine specimen of white calcite crystals formation, in white card tray with label reading: 'WHITE CALCITE, Chihuahua, Mexico'. 14 grams, 29mm (1"). From the historic ‘Victorian Museum’ and later

A group of four quartz crystal on matrix specimens, and one calcite on matrix, from the Rodopi Mountain region, Bulgaria. See Bonewitz, Dr. Ronald Louis, Rocks & Minerals, 2008. 9.2 kg, 8-21cm (3 1/4

A group of unusually formed, frosted calcite crystals on matrix. From India; From the historic ‘Victorian Museum’ and later collection of Gregory, Bottley & Lloyd (Gregory's); formerly Gregory, Bo

A large sheet of small, acicular calcite crystals on matrix. See Bonewitz, Dr. Ronald Louis, Rocks & Minerals, 2008, p.177. 725 grams, 22cm (8 3/4"). From the historic ‘Victorian Museum’

A sheet of tabular and nailhead calcite crystals from the famous Bulgarian locality. See Bonewitz, Dr. Ronald Louis, Rocks & Minerals, 2008, p.227-231. 795 grams, 19cm (7 1/2"). Property of a Gloucest

Natural Phantoms Fluorite Crystal with Calcite Mineral Specimen From Pakistan - Weight : 522 Gram Size : 90*87 mm Treatment : Natural Origin : Baluchistan Pakistan DHL Express Shipping Reserve: $250.0

Calcite with Marcasite Phantoms Linwood Quarry Buffalo, IA 2lb 8oz

Calcite Buffalo, IA 2lb 14oz

Marcasite Phantom Calcite Missouri 2oz

Calcite Clusters Buffalo, Iowa 8oz

Title: 528g Beautiful Natural RED Calcite Crystal Cluster Mineral Specimen/China Specimen: Calcite Carat Weight: 2640 Carats Dimensions: 86x69x110 MM Reserve: $85.00 Shipping: Domestic: Flat-rate of

A group of nine large calcite 'Iceland spar' mineral specimens. 1.68 kg total, 40-81 mm (1 1/2 - 3 1/8 in.) Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). [9, No Reserve]

A fine specimen of a hexagonal calcite crystal on a pyrite and galena matrix, in white card tray. 39 grams, 37mm (1 1/2"). From a historic ‘Victorian Museum’ collection; from the stock of Gregory,

A geode section containing richly-coloured amethyst crystal with two clusters of translucent opaque crystals; supplied in a white cardboard tray. 220 grams, 85mm (3 1/2"). From the historic ‘Victori