Danburite has an orthorombic crystal system and is in the family of Silicates. Generally it is a vertically striated prismatic crystal resembling Topaz. Crystals can be small and slender or as large as 12 inches (30cm) long and 4 inches (10cm) wide. It can range from being colorless to white, pale pink, gray, brownish and a straw yellow.
The original discovery of Danburite occured in Danbury, Connecticut in the US, but the exact location appears to have been lost. While a somewhat uncommon crystal, it is also found in Japan, several locations in New York state, Baja California, Switzerland, Bolivia, and Mexico.