Andalusite is mined in various countries around the world, including Spain, Russia, Brazil, South Africa, Sri Lanka, and China. Each of these regions has its own unique deposits of andalusite that are mined for commercial use.

Chiastolite is a form of andalusite and is sometimes called 'cross stone.'

Andalusite is a hard mineral, which makes it suitable for most jewelry uses, says the Gem Society. Andalusite's beauty is dependent on a proper cut, and it is polished, as with most gemstones. Cuts with a long axis, such as an oval cut, show more than one color. This cut often results in a lighter color in the center and a darker color near the ends. If the stone has a square or round cut, the colors blend into a mosaic pattern.

Kyanite and its two related minerals, andalusite and sillimanite, are used primarily in the glass-making, metallurgy, refractory, and ceramic industries.

NO. These are purely metamorphic minerals and not rocks at all!They are found in metamorphic rocks of different environments and are pure alumino silicate phases.