Spodumene

Spodumene is a hard and quite durable stone, also known as kunzite (in its pink to purple varieties) and hiddenite (in emerald-green). It is readily cleaved, cut into faceted gems often of great size, but the kunzite variety suffers from a strange condition: its color fades with the passage of time to a pale shadow of its former self. Such variants are called ghost-stone. A typical specimen has a base value of 50gp.