Orprase

Orprase is the Realms name for pollucite, a medium-hard, brittle, colorless or faintly straw-yellow gemstone. It was found as clear areas in otherwise uninteresting rock samples and was favored by followers of Tymora, presumably because it took luck to find them. Orprase produces small to medium size faceted gems. A typical specimen had a base value of 50gp.