Sinhalite

minerals

szaibelyite

ludwigite

warwickite

Formula: MgAl(BO4)
Anhydrous borate
Specific gravity: 3.475 to 3.5
Hardness: 6½ to 7
Streak: White
Colour: Colourless, pale grey, pale yellow, pale pink, green-brown to dark brown
Environments

Metamorphic environments

Sinhalite is a rare accessory mineral usually formed as irregular masses in boron-rich skarn at the contact of limestone with granite or gneiss; it rarely forms euhedral crystals in mineralised marble. Associated minerals include spinel, serendibite, ludwigite and warwickite (HOM, Mindat, Webmin).

The type locality is Sri Lanka.

Back to Minerals