This grouping of alchemists is incredible. Galena is a Lead Sulfide, Sphalerite is a Zinc Sulfide, Realgar is an Arsenic Sulfide. All of these have been used by Taoist priests since the 6th century for alchemy and protection. Splashes of yellow Sulphur on the Quartz Cluster add power to this piece. 1.50 lbs, and 4". From Peru.