Properties of Danburite

Danburite is a mineral composed of calcium boron silicate, with the chemical formula CaB2Si2O8. It belongs to the silicate mineral group and is characterized by its transparent to translucent crystals.

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Image of danburite mineral
Credit: Rob Lavinsky, iRocks.com - CC-BY-SA-3.0, via Wikimedia Commons

The following table provides a comprehensive list of danburite properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).

Note: click on the button to switch between Metric and Imperial units.

Table of Danburite Properties
Physical Properties
Metric
Chemical FormulaCaB2Si2O8
Crystal SystemOrthorhombic
Mohs Hardness7 - 7.5
Density3000 kg/m3
ColorColourless, white, gray, brownish white, straw yellow
DiaphaneityTransparent to translucent
LusterVitreous, greasy
Cleavage(001) Poor
FractureSubconchoidal to uneven
StreakWhite

Note: unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)

Related Pages
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017.