These sulfur crystals have been coming out of Bolivia for years, but we have high-graded tons of material to bring you these fabulous singular crystals. Gemmy, lustrous, electric yellow with skeletal crystal faces, these are really beautiful examples of this element. This would be considered collector grade crystals. The sulfur mines of Bolivia are frequently on fire so the sulfur is not always available. The very few minerals are this yellow without radioactivity. Simply gorgeous.