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This sample of phlogopite is displayed in the Smithsonian Museum of Natural History. Phlogopite is a silicate mineral with fluorine with the composition KMg3(Si3Al)O10(F,OH)2. The sample at left is about 12 cm across and is from Franklin, New Jersey. It is described as phlogopite with calcite.
这种磷灰石样品陈列在史密森尼自然历史博物馆中。磷灰石是一种含氟的硅酸盐矿物,其化学式为KMg₃(Si₃Al)O₁₀(F,OH)₂。左侧的样品宽约12厘米,来自新泽西州弗兰克林。该样品被描述为磷灰石并含有方解石。
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