Cassiterite is tin dioxide mineral, the primary tin ore and a significant specimen for collectors interested in economic minerals and industrial geology. This tetragonal mineral forms striking brown, black, or colorless crystals with high density and adamantine luster. Cassiterite specimens showcase diverse crystal habits including prismatic, dipyramidal, and cyclic forms, making them visually distinctive additions to any mineral collection.Major cassiterite sources include Bolivia, Malaysia, Indonesia, China, and the Democratic Republic of Congo, with notable deposits in Cornwall, England and various South American countries. This mineral forms in granitic pegmatites, hydrothermal veins, and as placer deposits. Bolivian deposits in Potosí Department have historically produced world-class specimens with exceptional crystal development and size. Malaysian and Indonesian deposits yield distinctive cassiterite with characteristic rich brown coloration.Explore our cassiterite specimen collection featuring crystals from important tin-producing regions worldwide. Our selection includes clear crystals, brown varieties, and distinctive forms perfect for economic mineral collections. Browse cassiterite specimens and add these tin oxide minerals to your collection.