This peridotite, which is also the main component of the mantle layer at the center of the earth, was also the host rock that crystallized "peridotite", which is the official name "olivine" and the popular name "peridot". If you look at it with a 10x magnifying glass, you can see some inclusions on the side, but they're so bright that they're shining olive green, and you can't see them. I'd say it's almost clean.
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