Spodumene belongs to the pyroxine group of minerals and is found as yellow, green, pink to violet, and colourless material.
Green spodumene is coloured by iron and has a light to mid green colour. Green spodumene is not rare and is reasonably priced, whereas the hiddenite variety of spodumene is very rare and very highly priced.
Kunzite: Is the pink to violet variety of spodumene.
Source locations for spodumene include: Afghanistan, Brazil (main source), Madagascar, Myanmar, Pakistan and the USA (California and North Carolina).
Hiddenite is found in: Brazil, China, Madagascar and the USA (North Carolina).
Irradiation is used to improve the colour of light green stones, the resulting colour is not stable.
Irradiated kunzite is normally stable, but prolonged exposure to heat and strong light may fade the stone.