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

Question

Quizplus · Accepted Answer

Diamonds typically form under high-pressure conditions in the Earth's mantle and are brought to the surface through volcanic eruptions via pipe-like structures known as kimberlite or lamproite pipes.

The Most Common Geologic Setting of Diamonds Is