Cassiterite specimens for sale

Cassiterite is a tin oxide mineral, SnO2, that typically forms dense, prismatic to tabular crystals with a strong, adamantine to resinous luster. The mineral commonly presents in dark brown to black tones, sometimes with reddish or orange hues when stained, and it can occur in heavy masses or well-formed crystals. It is a principal ore of tin and frequently associated with hydrothermal vein deposits, granitic pegmatites, and skarn environments, where it crystallizes in tight, concise habits that reflect its crystallographic symmetry. High-quality crystals from classic localities display sharp, well-defined faces and a vitreous to adamantine sheen that makes them highly prized by collectors.