Danburite is a mineral with a hardness of 7 out of 10 on the Mohs scale of mineral hardness [?]. These Orthorhomibicly structured gems are made of calcium borosilicate, their full chemical compound being CaB2(SiO4)2.
Danburite is a silicate of clear, prismatic crystals, with wedge-shaped terminations. It is occasionally pale yellow, a variety of gemstone feldspars group that resembles topaz. It is very hard, heavy, and has a transparent to vitreous to greasy luster. It fuses easily into a colorless glass, coloring the flame green, has a luminescence that is sky blue to pale blue-green, and also shows red thermoluminescence. It is insoluble in acids.
This crystal can be found in fissures and lining Alpine lithoclases, especially as an incrustation on albite. It occurs in granites and in metamorphosed carbonate rocks associated with hydrothermal activity.
Small, clear crystals with many faces are found in Val Medel (Grisons, Switzerland). It is found as a rarity in St. Barthelemy (Val d'Aosta) and in the Monte Cimini (Viterbo, Italy). Larger but not so fine crystals have been found in Mexico (San Luis Potosi), the Soviet Republics, Japan (Obira), Upper Burma, Madagascar, and in Danbury, Connecticut (USA).
Incorrect names given to it include "bemenite" or "bementite." Likewise, the term "danburite" or "danburyite" is a misleading term for light red corundum.
Danburite's Metaphysical Properties: Danburite is used by many who believe it has the power to improve a groups cohesiveness. It may also be used to heal muscles, and improve fine motor skills.
It derives its name from Danbury, where the first find was located.
Danburite is usually of interest only to scientists and collectors, but also used as ornaments and cut as attractive, bright stones. It is sometimes confused with citrine and topaz.