mineral
Yellow Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
Mohs hardness of 5; vitreous to sub-resinous luster; yellow, golden, or greenish-yellow color; hexagonal crystal system; poor cleavage; specific gravity around 3.1-3.2.
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Physical properties
Mohs hardness of 5; vitreous to sub-resinous luster; yellow, golden, or greenish-yellow color; hexagonal crystal system; poor cleavage; specific gravity around 3.1-3.2.
Formation & geological history
Forms in igneous, metamorphic, and sedimentary environments, frequently in pegmatites, hydrothermal veins, and carbonatites.
Uses & applications
Used primarily for fertilizer production (phosphate source), optical components, and as a collector's mineral or occasional gemstone.
Geological facts
Apatite is the defining mineral for 5 on the Mohs scale of mineral hardness. Its name comes from the Greek word 'apatein', meaning 'to deceive', because it is often confused with other minerals like tourmaline, beryl, or topaz.
Field identification & locations
Identified by its distinctive hexagonal crystal form, characteristic 5 Mohs hardness, and basal cleavage. Found globally in locations such as Mexico, Madagascar, Brazil, and Canada.
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