Peridot belongs to a kind of silicate, and is not considered to be a high-grade gemstone, high-grade gemstones are diamonds, rubies and sapphires, etc., mid-range gemstones are tourmalines, peridot, pearls, amber, etc., and low-grade gemstones are fluorite, moonstone, etc. ...
It can be seen that ruby belongs to the corundum gemstone, the hardness is second only to diamond, ruby is better.