Description
This Prehnite crystal is light green, and about 1.75 x 1.5 x .75 inches. It has a bladed crystal formation and comes from Midelt, Morocco. Prehnite is a calcium aluminum silicate mineral with the formula Ca2Al(AlSi3O10)(OH)2. It usually forms in bladed, stalgtitic or botryoidal crystals within volcanic cavities and hydrothermal veins.
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