A widely occurring pale green to purple mineral, consisting of calcium phosphate with some fluorine, chlorine, and other elements. It is used in the manufacture of fertilizers.
- Magnetite, apatite, titanite and zircon make up the accessory minerals.
- Some calcareous veins contain epidote, titanite and apatite.
- The next few pockets yielded only dark blue apatite and clear to smoky to pale citrine quartz.
Early 19th century: coined in German from Greek apatē 'deceit' (from the mineral's diverse forms and colours).
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