Danburite is a calcium borosilicate (CaB2Si2O8) that was first
discovered in Danbury, Connecticut. Guess how danburite got its name. This mineral
has a Mohs' hardness of 7-7.5 and is normally colorless to very light pink in color.
It has been found in the USA, Bolivia, CIR, Japan, Germany, Switzerland, and Mexico.
The Charcas Mineral District in the state of San Luis Potosi was discovered in 1574
and has been worked ever since for lead, zinc, copper and silver. The metal ore deposits
are found in veins along faults in shaly limestone, volcanics, and monzonites. Associated
with these ore deposits are gemmy crystals of danburite such as that pictured below.
