A smoky octahedron of quartz

Stats
A smoky octahedron of quartz is a glowing hidden anti-good anti-evil nolocate burn-proof nouncurse treasure, level 30, weighting 1 pound(s). Affects mana by 5 (all races). Affects spells by 3 (all races). Affects prayer_affect by 3 (all races). Its average value is 3500 silver coins.

Additional Information
Found in Morruin's Temple, sold by Branwen.