apatite, ap′a-tīt, n. a phosphate of lime of great variety of colour.
The usual association with apatite and magnetite crystals is noted.
Phos′phorite, a massive radiated variety of apatite; Phos′phuret, a compound of phosphorus with a metal.
With regard to its mode of occurrence, apatite is found under a variety of conditions.
In its general appearance, apatite exhibits wide variations.
The “asparagus-stone” is a form of apatite, simulating asparagus in colour.
The accessory minerals of these rocks are principally oligoclase, muscovite, apatite and zircon.
apatite (phosphate of lime) and pyromorphite (phosphate of lead) contain a considerable amount of it.
Phosphorite is another name for apatite, but is chiefly applied to impure amorphous apatite.
apatite is doubtless derived from the remains of animals or fishes that lived in the distant past.
Any of several, usually green, transparent, hexagonal minerals consisting of calcium phosphate with either fluorine, hydroxyl, chlorine or carbonate. Apatite occurs in igneous, metamorphic, and sedimentary rocks, and is used as a source of phosphate for making fertilizers. Chemical formula: Ca5(PO4CO3)3(F,OH,Cl).