A Peridot is a common Gemstone, primarily of use for bartering, or sale to Traders.
Green as poison, but no more dangerous than a pebble.
Properties
Miscellaneous Items
Rarity: Common
Weight: 0.01 kg / 0.02 lb
Price: 65 gp 
UID
LOOT_GEM_Peridot_A
Where to find
Found throughout the game as set-dressing and random loot.