Sunstone (gem)

Sunstone is a feldspar gem, closely related to moonstone, and more properly known as oligoclase. Sunstone can be colorless or faintly greenish and of facet grade, but most common by far is its softer (cabochon) variety. This rarely yields gemstones more than three-quarters of an inch (2 centimeters) in diameter, and has bright red or orange spangles (minute crystals) suspended in a nearly colorless background in a parallel fashion, giving the whole a rich golden or reddish brown color. A typical specimen has a base value of 10gp.

Properties
Sunstones can be made into talismans, usually in the form of jewelry, that can act on undead just like full sunlight. A sunstone talisman must be charged by being left in full sun for at least one day (about six hours of continuous exposure). Thereafter, the talisman may be worn and will remain dormant until the wearer is successfully attacked (physically touched) by an undead creature. If the undead attacker is affected by sunlight, it will: Undead that are not harmed by light (skeletons, mummies, and liches for example) are completely immune to a sunstone talisman. Ghosts are forced into a semi-material state. Vampires take actual damage but cannot be slain by a sunstone talisman alone. Only the detached head and entrails of a penanggalan are susceptible to sunstone talisman effects.
 * recoil in fear or pain for a few minutes
 * be easier to hit as it turns away from the talisman
 * be unable to use abilities such as regeneration, energy drain, chilling touch, etc.