Optical Calcite Mineral Specimen Collection.

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 large group of various minerals comprising: optical calcite, muscovite, amethyst, lepidolite mica, pyrite, realgar orpiment, topaz, rubellite, malachite, satin spar, petrified wood, an amethyst pend

Optical Calcite Double Refraction 2oz

Double-refractive optical calcite. Mexico 5oz

An eclectic collection of mineral specimens in labelled collector's boxes comprising: fluorite, apache tear, petrified wood, specular hematite, red and orange calcite, quartz, ruby in zoisite, chiasto

A group of 14 mineral specimens including fluorite, fluorite and mimetite, calcite with pyrite, apophyllite (2), calcite stalactite, amethyst, tabular aragonite, amethyst druse, galena and chalcedony,

Optical Calcite Double Refraction Mexico 3oz

A group of 29 mineral specimens, including: popcorn aragonite, citrine (2), rock crystal (2), red jasper, green calcite, haematite, amethyst (2), galena, apophyllite, blue agate, dendrite, pyrite, dio

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 mixed group of mineral specimens, each accompanied by an identification label detailing the location of the find: fluorite (2); smokey quartz and haematite; calcite; quartz over fluorite; baryte. 1.

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 mixed group of mineral specimens, each accompanied by an identification label detailing the location of the find: fluorite; iridescent goethite; rutile; calcite; chenevixite; azurite and chalcocite;

A mixed group of mineral specimens, each accompanied by a collector's identification label detailing the location of the find: calcite; goethite; pyrite; calcite analcime. 345 grams total, 38-59 mm ea

A mixed group of mineral specimens, each accompanied by an identification label detailing the location of the find: wavellite; cassiterite; calcite; fluorite. 537 grams total, 50-78 mm (2 - 3 in.). Fr

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,

to include: blue kyanite, amethyst flower, deep green tourmaline in a quartz matrix, possibly blue-green dogtooth calcite, semi-translucent scolecite spray specimen, possibly blue barite spray on limo

A mineral specimen of translucent calcite on quartz with a large layered dark mass to the centre, a small cluster of clear six-sided pyramid crystals underneath, old inked collection number '517' to b

About ten mineral specimens of mostly unknown localities including Large single-crystal rhomb of Calcite, calcium carbonate, (~8 x 6 x 3 inches, 9 pounds); A single-crystal wedge of Calcite (7 x 3.75

2 specimens with bases. Includes Gobi stone intricately wind carved chalcedony 4.5 x 3 x 2 ; stalactitical calcite cluster coral like structure white finely crystalline 4 x 3 x 3 China Chunlin Zhu Col

New Mexico Collection: Pyrite, Calcite, Mesolite, Brochantite, Hemimorphite, Fluorite Charlie Hall Collection

Missouri Collection: Barite, Chalcopyrite/Dolomite, Galena/Chalcopyrite, Pokrovskite, Calcite, Calcite/Pyrite, Marcasite/Calcite, Galena/Quartz Charlie Hall Collection

Calcite SW Florida Charlie Hall Collection

3/4 - 1 1/4 in. (155 grams total, 19-32 mm)DESCRIPTION:A group of 14 white calcite specimens, each held in a white card collector's tray.[14, No Reserve]PROVENANCE:From Mexico.Mineral Imports, London,

Chalcopyrite Calcite Pea Body Mine, Sullivan, MO Charlie Hall Collection