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Minéraux pour la classe

Les échantillons de minéraux sont taillés en différentes tailles pour répondre aux besoins variés des utilisateurs, avec des utilisations courantes telles que l’identification par les étudiants, les présentations lors de cours et de démonstrations, ou encore en fragments pour des tests d’identification en laboratoire. Ces spécimens illustrent également plusieurs caractéristiques géologiques classiques, comme le clivage, et les collections peuvent être utilisées pour tester et comparer la dureté Mohs d’autres minéraux.

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Ward's® Labradorite (Cleavage)

Ward's® Labradorite (Cleavage)

Feldspar group; good cleavages of pure soda lime feldspar; most show twinning and labradorescence.

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Ward's® Chalcopyrite

Ward's® Chalcopyrite

Good grade, brass-yellow copper ore, massive.

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Ward's® Fluorite (Fluorescent)

Ward's® Fluorite (Fluorescent)

Brown, fluorescent crystals intergrown in dolomite rock.

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Ward's® Hornblende (Cleavage)

Ward's® Hornblende (Cleavage)

Amphibole group; dark greenish black cleavages, somewhat columnar.

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Ward's® Hematite (Red Ochre)

Ward's® Hematite (Red Ochre)

Red, earthy, in natural chunk form; common pigment ore.

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Ward's® Azurite

Ward's® Azurite

Bright blue crystalline veins and coatings in a matrix of mixed copper ore.

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Ward's® Kaolin (Powdered)

Ward's® Kaolin (Powdered)

Pure kaolinite powder, 200 mesh.

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Ward's® Bauxite

Ward's® Bauxite

Classic “peacock” aluminum ore.

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Ward's® Biotite

Ward's® Biotite

Cut black mica cleavage sheets.

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Ward's® Oligoclase

Ward's® Oligoclase

Feldspar group; white-to-gray cleavages of sodic plagioclase; some show twinning.

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Ward's® Coals, Set Of 4

Ward's® Coals, Set Of 4

A classroom set that covers the major types of coal.

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Ward's® Calcite (Iceland Spar)

Ward's® Calcite (Iceland Spar)

Clear rhombs showing double refraction.

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Calcite (Chalk)

Calcite (Chalk)

Classic, white chalk, massive; from Cliffs of Dover, England.

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Ward's® Corundum

Ward's® Corundum

Crystals and crystal sections up to 1", Mohs’ hardness of 9.

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Ward's® Fluorite (Cleavage)

Ward's® Fluorite (Cleavage)

Pure, large, transparent-to-translucent cleavages, Mohs’ hardness of 4.

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Galena

Galena

Bright metallic cubic cleavages; lead ore.

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