GREEN GEMSTONES: 10 Most Celebrated
The green stone gets this shimmering effect from platy inclusions, usually consisting of mica. ... which is at most 7 out of 10 on the Mohs scale. Pliny noted this by saying that peridot is the only precious stone affected by an iron file, where others have to be smoothed with Naxian stone and emery. Peridot also wears away with use.