Specific gravity: 3.475 to 3.5
Hardness: 6½ to 7
Colour: Colourless, pale grey, pale yellow, pale pink, green-brown to dark brown
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
(HOM, Mindat, Webmin).
The type locality is Sri Lanka.
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