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.

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 icon 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.