Kyanite is a relatively rare mineral k
nown for its long, slender, translucent crystals.
It's an aluminium silicate, a chemical compound of aluminium, silicon and oxygen.
Kyanite commonly occurs in shades of blue, ranging from pale blue to an intense blue that has been known to rival the colour of sapphire.
Although kyanite is brittle, it's widely used in industry because of its hardness. Crystals can withstand high temperatures and extreme pressure.
Kyanite is a difficult mineral to cut because of its variation in hardness. For this reason, it's rarely used as a gemstone.
Jasper
