Kimberlite
Rock
Also called Blue ground and Yellow ground (weathered)
About it
Soft, often altered rock full of rounded fragments and green olivine or serpentine, erupted from deep in the mantle in carrot-shaped pipes. The main source of diamonds; named for Kimberley, South Africa, and mined in the Northwest Territories.
- Type
- Rock (igneous)
- Group
- Igneous (volcanic pipe)
- Colours
- blue-grey, greenish grey, yellow-brown when weathered
- Transparency
- opaque
Typical values: real specimens vary. For more, see mindat.org.