Willemite was discovered in 1830 and named after William I, King of the Netherlands. This stone has remarkable luminescent properties. Some specimens glow under an ultraviolet source and continue to glow after the UV light has been removed, a phenomenon called phosphorescence. Specimens that are faceted make beautiful gemstones in blue, yellow, green and brown colors.
- Optical Properties
- Characteristic Physical Properties
- Chemistry & Crystallography
LWUV: Weak to strong greenish yellow to green
Countries of Origin
United States of America (the); Unknown