Question

Which statement is not an example of a way a mineral can form?

A.
A tourmaline crystal forms from magma cooling very slowly underground.
B.
Dissolved substances crystallize on the bottom of a lake as dolomite.
C.
Scientists grow a diamond under laboratory conditions.
D.
Pressure underground causes particles in rock to reorganize, forming garnet.

Answer 1

C.

Minerals must be naturally occurring; a diamond grown in a lab is synthetic and not considered a naturally formed mineral.