Phosphorite is a sedimentary rock of biochemical origin. Phosphorite results from the accumulation of the shells of certain microorganisms that incorporate phosphate minerals such as apatite in their shells.

Massive apatite is sometimes called phosphorite.

See Steve's video interview about asteroid capture at Moonandback:
Part 1
Part 2
Part 3

Copyright ©1995-2023 by Amethyst Galleries, Inc.