Learn about Anhydrite
water-free CaSO4 crystals with orthorhombic cleavage, blue to lilac hues; prized for sharp forms, angelite color, and rare, unaltered specimens.Prospect Park Quarry
Prospect Park Quarry, USA — renowned for green prehnite with hollow epimorphs, rich basalt cavities, and a key collector locality in Paterson–Passaic County.
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