Prehnite vs Zircon
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Prehnite
Prehnite is an orthorhombic calcium aluminosilicate mineral with the formula Ca2Al2Si3O10(OH)2. It was described in 1788 from the Karoo dolerites near Cradock in South Africa and named for Hendrik von Prehn, a Dutch colonial officer credited with bringing specimens to Europe. Pale green material is used as a gemstone, and gem-quality deposits are known around Wave Hill in Australia's Northern Terr...
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Zircon
Zircon is a naturally occurring mineral composed mainly of zirconium silicate, with the chemical formula ZrSiO4. It crystallizes in the tetragonal system and commonly forms durable crystals in igneous rocks, metamorphic rocks, and sedimentary deposits. Transparent varieties can be cut as gemstones and may show strong brilliance because of their refractive properties. Zircon is also important to ge...
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