Réf : BH848

Calcite on Hematite and Limonite - Morocco - crystal minerals 9.4 cm / 186g / BH848 - Vignette | 1001 minéraux

Calcite on Hematite and Limonite - Morocco - crystal minerals 9.4 cm / 186g / BH848

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CALCITE belongs to the carbonate group and contains calcium and carbon. Its chemical formula is CaCO3, exactly the same as that of Aragonite or Limestone.

It is a calcium carbonate. Calcite occurs in a massive or crystallized form with a beautiful development of crystals that are found in various facies, dendritic, crested, nailhead, sandy, dog tooth...... The hardness is equal to 3/10 on the Mohs scale (10 for diamond) and the density has an average value of 2.7 (1 for water). The line on the porcelain is white.

Calcite has a vitreous luster and feels soft to the touch. It comes in several color variations: brown, red, green, blue, yellow, and colorless. Transparent specimens have a birefringence property and therefore reflect a double image.

The name comes from the Latin calx which means lime

Hematite belongs to the oxide group. It mainly contains iron. Its chemical formula is Fe2O3.

Apart from the massive form, Hematite presents tabular, scale-like or mound-shaped (kidney-like) crystals.

Hematite is metallic gray in color but produces a red streak on porcelain. Its hardness is greater than 5/10 on the Mohs scale (10 for diamond) and its specific gravity varies between 5.2 and 5.3 (1 for water).

Oligistic hematite is a variety with few faces, while specularite hematite is a variety of large, shapeless, shiny crystals. Some specimens resemble sand roses and are called iron roses.

The name Hematite comes from the Greek word haima which means blood.

LIMONITE belongs to the hydroxide group. It contains iron. Its chemical formula is 2Fe2O3.nH2O.

It occurs in various non-crystallized forms. LIMONITE has long been used as an iron ore.

Its color varies from brown to yellow. It is frequently used as a pigment.

Unique piece - Contractual photos

Origin: crystal minerals from Morocco

Dimensions: 9.4 x 5 x 2.9 cm

Weight: 186 g