ROBERTO DE GUGLIEMO / SCIENCE PHOTO LIBRARY ROBERTO DE GUGLIEMO / SCIENCE PHOTO LIBRARY
Crystals of pyromorphite (lead phosphate chloride), a minor ore of lead which occurs in the oxidised zones of lead deposits. The name pyromorphite is derived from the Greek words meaning fire and form. This specimen measures 5 x 5 cm and was found in Boquira, Bahia, Brazil.
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