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What are the only two gemstones that form in the Earth's mantle?

Question #149691. Asked by BigTriviaDawg.
Last updated Aug 23 2023.
Originally posted Aug 23 2023 8:02 PM.

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psnz star
Answer has 2 votes
psnz star
5 year member
1007 replies avatar

Answer has 2 votes.
The diamond and the peridot.
Most gemstones form in the Earth’s crust. Only two gemstones form in the Earth’s mantle – the diamond and the peridot. These are gems that crystallise at extremely high temperatures.
link https://thegemmuseum.gallery/gemstones-earths-mantle/
Fun fact: Diamonds may actually be the most plentiful crystals in the earth, but they just aren’t the easiest to reach
Response last updated by psnz on Aug 23 2023.
Aug 23 2023, 8:03 PM
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