olivine

The mineral olivine (when of gem quality, it is also called peridot and chrysolite), is a magnesium iron silicate with the formula (Mg,Fe)2SiO4. It is a common mineral in the Earth's subsurface but weathers quickly on the surface.

For more information about olivine check the Wikipedia article here

ZME Science posts about olivine

Asteroid Vesta is a lot like Earth, study shows

Mon, Jan 21, 2013

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The cold, lifeless Vesta asteroid might be a lot more like our planet than astronomers believed – having a very active life in the early stages of the solar system evolution, a study of a Saharan meteorite shows. The planet that wasn’t Vesta might host a magmatic layer under its rocky exterior, allowing minerals to [...]

Shorties: Stunning pictures of Fukang Pallasite

Mon, Nov 14, 2011

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You’re probably wondering what a Pallasite is; well Pallasites are is a type of iron meteorite, quite rare, made out of large olivine crystals in an iron-nickel matrix – and they look just fabulous. Olivine is a a magnesium iron silicate quite common in our planet’s subsurface, but which weathers fast when exposed to the surface. [...]

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