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It frequently occurs in distinctive pyramid-like structures
It consists of lead carbonate which crystallizes in the orthorhombic system
M Shoemaker about 30
often with veins or matrix patterns of other minerals like black or brown
Apophyllite and Prehnite Cluster | 131 grams | Jalgaon, India | SO24 Prehnite It frequently occurs in distinctivePrehnite can form prismatic, tabular, or pyramidal crystals, but usually occurs in botryoidal, reniform, stalactitic, granular, or compact habits. It is usually green in colour, but may be white, colourless, yellow, or gray. It has a colourless streak. Prehnite is transparent to translucent, with a vitreous to pearly luster. Prehnite forms in cavities in basaltic lavas. Apophyllite is more often then not the star attraction and very popular among
