Sunstone EggAn egg shaped form cut to show the aventurescence from every direction at once. Sunstone is a feldsparoligoclase or orthoclasecontaining hematite or goethite platelets in parallel layers within the crystal. Light entering the stone scatters off those platelets and returns as a glittering, coppery shimmer: aventurescence. The egg form has no flat facets to interrupt the viewing surface, so the effect plays continuously across the curve as the piece is