Peridotite
Rock
Also called Lherzolite, Harzburgite, and Wehrlite
About it
Heavy, dark green rock made mostly of olivine with some pyroxene, often weathering rusty brown. The main rock of the upper mantle, exposed in ophiolites such as the Tablelands of Gros Morne, Newfoundland.
- Type
- Rock (igneous)
- Group
- Igneous (ultramafic plutonic)
- Specific gravity
- 3.1–3.4
- Colours
- olive green, dark green, greenish black, rusty brown when weathered
- Transparency
- opaque
Typical values: real specimens vary. For more, see mindat.org.