’A’ Crystals:

ANGELITE ( ANHYDRITE) - Lilac blue Anhydrate is sometimes called Angelite, for it's "Angelic" color.
CHEMISTRY: CaSO4, Calcium Sulfate
COLOR: Ordinarily white, gray or colorless, but also blue to violet.
CLASS: Sulfates
CRYSTALLOGRAPHY: orthorhombic; 2/m 2/m 2/m
Crystal Habits include the tabular, rectangular box formed by three pinacoids, often elongated in one direction forming a prismatic crystal. Most commonly massive and granular.
REFRACTIVE INDEX: 1.544 - 1.553
HARDNESS: 3.5
SPECIFIC GRAVITY: approximately 3.0 (average for translucent minerals)
TRANSPARENCY: Crystals are transparent to translucent.
CLEAVAGE: three directions forming rectangles, but perfect in one, very good in another and only marginally good in the third direction.
FRACTURE: Conchoidal
Uses: in the manufacture of some cement, a source of sulfate for sulfuric acid.
Associated Minerals: Calcite, halite, and occasionally sulfides such as galena and pyrite.
Other Characteristics: some specimens fluoresce under UV light.
Notable Occurrences include Mexico; Peru; Germany and New Mexico.
Best Field Indicators are crystal habit, rectangular and non-uniform cleavage and low density.

Astrological Sign of Aquarius
Metaphysical Properties:

 

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