Peridot is a magnesium and iron silicate with a chemical formula of (MgFe)2SiO4, one of the most common minerals on earth. Olivine also appears on some meteorites, moons, Mars and some comets (such as Vir Part of the comet on the comet 2, and the nucleus of the Temple 1 comet.
Peridot is a medium-low-grade gemstone with greenish yellow and olive-like colours. The most common on the market is the peridot counterfeit made of tinted glass.
The main difference between the two is that the olivine has obvious "double shadow", but the glass does not; the olivine is often seen in the crystalline inclusions, the glass contains only bubbles; the olivine has a specific gravity of 3.5 and a hardness of 7, which is better than glass. Both the specific gravity (2.6) and the hardness (6) are large.
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