Crocoite vs Herderite
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Crocoite
Crocoite is a lead chromate mineral with the chemical formula PbCrO4. It commonly forms slender, elongated crystals in vivid orange, red, or reddish-orange colors, making well-formed specimens valued by mineral collectors, although its softness and lead content limit practical use as jewelry. The mineral was first identified from material found in the Ural region, while the Dundas district of Tasm...
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Herderite
Herderite is a calcium beryllium phosphate mineral in the apatite group, with the formula CaBe(PO4)(F,OH). It crystallizes in the monoclinic system and commonly appears as colorless, pale-yellow, or greenish-white prismatic crystals; transparent crystals from Minas Gerais, Brazil, have been cut as gems. Herderite forms a compositional series with hydroxylherderite, a related mineral reported from...
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