Réf : BE404

Minéral cristallisé d'apophyllite verte et de mordénite d'Inde

Apophyllite and Mordenite - India - crystal minerals 4.9 cm / 76 g / BE404 - Vignette | 1001 minéraux

Apophyllite and Mordenite - India - crystal minerals 4.9 cm / 76 g / BE404

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APOPHYLLITE belongs to the silicate group. It contains fluorine or hydroxide, potassium, calcium, silicon, and water. Its chemical formula is KCa4Si8O20(F,OH).8H2O.
Apophyllite usually occurs in tabular or prismatic crystals. It is often associated with Stilbite. Like Stilbite, Apophyllite is a member of the zeolites (a group of minerals whose porous structure is essentially composed of aluminosilicate and water molecules. Thus, when a zeolite is heated, the crystals bend as the water evaporates).
The average hardness of Apophyllite ranges from 4.5 to 5/10 on the Mohs scale (10 for diamond) and its density ranges from 2.3 to 2.4 (1 for water). The line on porcelain is white or colorless.

Apophyllite is usually white but also comes in colorless, green, yellow, or red.
The name Apophyllite comes from the Greek word apophullisa which means to peel (related to the property of zeolites).

MORDENITE belongs to the silicate group. It contains calcium, sodium, potassium, aluminum, and silicon. Its chemical formula is (Ca,K2,Na2)(AlSi5O12)2,7H2O.

MORDENITE appears as long, needle-like crystals in a radiating sphere. It is a zeolite. Its color is generally white, cream, but also yellowish.
Mordenite's name comes from the small community of Morden in Canada where it was found.

Unique piece - Contractual photos

Origin: Crystal minerals from India

Dimensions: 4.9 x 4.1 x 4 cm

Weight: 76 g