Kimberlite is:

Kimberlite is:

• A. Kimberlite
• B. Lamproite
• C. Granite
• D. Sandstone

Answer: (A)

Kimberlite is an ultramafic, volatile-rich volcanic rock formed deep in the mantle that erupts rapidly to create pipe-like bodies near the surface. These eruptions carry diamonds from the mantle up into crustal rocks, so kimberlite pipes are the classic sources looked for in diamond exploration. Granite, by contrast, is a silica-rich intrusive rock formed underground, and sandstone is a sedimentary rock made of sand grains—neither of which are mantle-derived volcanic rocks associated with diamond transport. Lamproite is another mantle-derived volcanic rock, but kimberlite is the rock most famously and consistently linked to diamond-bearing deposits.

Kimberlite is an ultramafic, volatile-rich volcanic rock formed deep in the mantle that erupts rapidly to create pipe-like bodies near the surface. These eruptions carry diamonds from the mantle up into crustal rocks, so kimberlite pipes are the classic sources looked for in diamond exploration. Granite, by contrast, is a silica-rich intrusive rock formed underground, and sandstone is a sedimentary rock made of sand grains—neither of which are mantle-derived volcanic rocks associated with diamond transport. Lamproite is another mantle-derived volcanic rock, but kimberlite is the rock most famously and consistently linked to diamond-bearing deposits.