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Danburite is a silicate mineral with the chemical formula CaAl2Si2O8.

It is named after the Danish city Danbury.

Danburite typically forms prismatic crystals and can be quite transparent.

The mineral is usually colorless, but can also be yellow, brown, or pale pink.

Danburite is often used in gemstone and crystal collections due to its attractive appearance.

It is closely related to beryl but has a different crystal system.

Danburite was first discovered in 1796 in the United States.

The main occurrence of danburite is in pegmatitic deposits.

Danburite can also be found in areas of metamorphic and volcanic rocks.

The mineral is not commonly used in jewelry, but it is valued for its aesthetic qualities.

Some danburite specimens are prized for their high clarity and gem-quality color.

Danburite can form large crystals, sometimes up to several meters in length.

Danburite is a sesquicarbonate of calcium aluminum silicate.

The mineral is often associated with minerals such as quartz, feldspar, and other pegmatite occurrences.

Danburite has a hardness of 6.5 to 7 on the Mohs scale, making it suitable for decorative uses.

Due to its chemical composition, danburite is generally stable, resisting chemical weathering.

The crystal habit of danburite is generally elongated, with prismatic forms often prominent.

Danburite is sometimes used in the production of radiation detectors due to its piezoelectric properties.

Some danburite crystals are used in the calibration of optical instruments.

Danburite can also be found in meteorites, suggesting its occurrence in extraterrestrial environments.