SG Heritage Dictionary

Apatite [Noun] Webster's Dictionary 1828

1. A variety of phosphate of lime; generally crystallized in low, flat, hexahedral prisms, sometimes even tabular. Its powder phosphoresces on burning coals.

2. The phosporite of Werner includes the massive and earthy varieties of the phosphate, which are distinguished from the apatite by their containing a small portion of fluoric acid.

Apatite [Noun] Webster's Dictionary 1913

Native phosphate of lime, occurring usually in six-sided prisms, color often pale green, transparent or translucent.