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>> Group(s) : silicates
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It owes its name to Danbury (Connecticut, United States), where she was discovered in the nineteenth century. In a similar hardness as quartz, it does not exist in brightly colored varieties.

Exploited sites

They are found in Mexico (known crystals from Charcas, San Luis Potosi), Burma, the United States, Japan, Madagascar, Russia.

See pictures of the mines / other pictures

Use in jewelry

It is easy to faceting because of its poor cleavage and hardness.
This is a gem for collectors which can be used in jewelry when it is colored.

Looking alike stones

citrine , rock crystal , hambergite , phenakite , topaz

Historical healing properties

It would be a stone of spirituality that leads to enlightenment, to our cosmic achievement. Of a purest vibrational potential, more than rock crystal, it has the same clarity but acts very smoothly. It works on all chakras and is particularly suited to qualified individuals, full of tenderness and caring towards others.

Imitations and treatments

No synthesis to date.
Russian Danburites are irradiated to give them a yellow color.

Chemical characteristics

calcium boron - silicate

Physical characteristics

Main color : colourless

Other colors : brown, yellow, pink

very clear and transparent it presents light colourings yellow or pink

Color of streak : white

Luster : vitreous, greasy

Hardness : 7.0 to 7.5

Density : 2.96 to 3.04

Cleavage : indistinct

Fracture : uneven

Optical properties

Transparency : transparent

Refractive Index : 1.625 - 1.639

Double refraction : 0.006

Very weak, bi-axial +/ -

visible double refraction : no

Dispersion : 0.017 (0.009)

Pleochroism : weak

Number of colors : 2

Colorless, yellow

Absorption spectrum : 585

Fluorescence : moderate

Blue, pink ,brown

Inclusions : glowing, parallel channels


Prismatic but seldom of big size


Crystal system : orthorhombic

Other informations
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