Moss agate

Moss agate was one of many forms of quartz agate found in the Realms.

Description
Impurities of manganese formed grayish green fern-like patterns that resembled moss embedded in the pink to yellow-white semi-transparent or translucent ornamental stones. Folklore said moss agate promoted serenity and stability so it was displayed as a polished stone, mounted cabochon, or was powdered and used in sleeping draughts and other potions. A typical stone had a base value of 10 gp.