White mica plaque with a border of Madagascar lepidolite - 9.1 cm - 39 g / BP646

White mica , or muscovite, belongs to the silicate group. It contains potassium, aluminum, silicon, and fluorine. Its chemical formula is KAl2(Si3Al)O10(OH,F)2.
White mica comes in the form of flat crystals with a roughly hexagonal shape. It is the mineral commonly called "mica".
Its color is generally white, yellow, or pinkish-brown. The hardness of white mica ranges from 2 to 2.5 on the Mohs scale (10 for diamond), and its average density is slightly less than 2.8 (1 for water). The streak on porcelain is almost colorless.
The name Muscovite comes from the British name for the city of Moscow.

Lepidolite belongs to the silicate group. It contains potassium, aluminum, silicon, fluorine, and lithium. Its chemical formula is K(Li,Al3)(AlSi3)O10(OH,F)2. It is a mica.
Lepidolite occurs in a raw, mammillated form, or with scale-like, tabular crystals, ranging in color from pink to light purple, yellow, or colorless. Its density is 3 (1 for water) and its average hardness is around 3/10 on the Mohs scale (10 for diamond). The streak on porcelain is colorless.
Its name comes from the combination of two Greek words lepidos and lithos which mean scale and stone.

Unique piece - Photos are of the actual item

Origin: crystal minerals from Madagascar

Dimensions: 9.1 x 5.3 x 0.3 cm

Weight: 39 g