Greenstone

Greenstone is the common name of chlorastrolite, a gray-green variety of pumpellyite, found in nodules of up to three quarters of an inch (two centimeters) in diameter in solidified lava flows. It is soft and is usually cut cabochon; the finest quality greenstone can be polished to a glassy finish, and such stones are sometimes called chlorastras. Greenstones of exceptional size are made into greenstone amulets, but not all greenstone jewelry is so enchanted, and often a ruse is used involving nonmagical greenstones and Nystul's magical aura.