Learn about Anhydrite
water-free CaSO4 crystals with orthorhombic cleavage, blue to lilac hues; prized for sharp forms, angelite color, and rare, unaltered specimens.Kohnstein Quarry
Kohnstein Quarry, Germany — a distinctive European collector locality for evaporites, famed for hydroboracite on anhydrite and a diverse borate suite.
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