The Most Common Geologic Setting of Diamonds Is

Multiple Choice

The most common geologic setting of diamonds is:

A) crystallization of the water-rich parts of a granite magma, forming pegmatite crystals
B) deposition of minerals by hot waters, such as in a vein
C) replacement of a rock by ore minerals due to hot fluids
D) formation in the mantle and subsequent rise in pipe-like volcanic conduits
E) none of these