Amethyst geode with calcite crystal

Weight 19.2 kg
Original shape amethyst geode including a beautiful cubic calcite crystal.
Weight 19200 gr. 19.2 kg
Size max 37 cm 370x360x200 mm
Reference 210104548
Mineral variety of mineral Amethyst
Mineral 2 mineral Calcite
Category Crystals and geodes
Group Geodes
Country Country Brazil Brazil
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Formula SiO2] AMETHYST
O Oxygen Other no metal 53.25%
Si Silicon Metalloids 46.74%
Amethyst is a variety of purple colored quartz made from silicon dioxide. It is a fine or even precious stone used in jewelry and as an ornamental stone. Its color, covering almost all shades of purple, from very light to very strong purple, is due to the iron inclusions it contains. It is a stone formerly rare but important deposits having been discovered at the beginning of the XXth century in Brazil and Uruguay, it is now a common stone.
Formula CaCO3] CALCITE
O Oxygen Other no metal 47.95%
Ca Calcium Alkaline earth metal 40.04%
C Carbon Other no metal 12%
Calcite is a mineral species known since antiquity and consisting of carbon, oxygen and calcium. Calcite due to its many possible inclusions, has a wide range of possible colors: zinc, iron, copper, manganese, barium, magnesium, aluminum, cobalt ... Calcite is an aragonite. In crystalline form it presents several forms of crystals: more or less elongated prisms, rhombohedra, tablets. Calcite has many industrial applications, in particular in construction: cement, lime, ornamental stones ... We usually find calcite in limestone and metamorphic rocks like marble.

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