Thuparlial

Thuparlial is also called prehnite. This hard, tough gemstone varies in color from rich green through pale greenish yellow and yellow to brown. It is translucent and is cut in facets if light-colored but otherwise cut cabochon. It is abundant in hardened lavas as crust lining gas cavities in the rock, but only rarely is this crust thick enough or colorful enough to be cut into gemstones. A typical specimen has a base value of 10gp.