Agate is a common Gemstone that is primarily sold for Gold or bartered to Merchants.
A fine stone for carving, often found at the base of volcanoes.
Properties
Miscellaneous Items
Rarity: Common
Weight: 0.01 kg / 0.02 lb
Price: 20 gp 
UID
LOOT_GEM_Agate_A
Where to find
Found throughout the game as set-dressing and random loot.
External Links
Agate on the Forgotten Realms Wiki