This is a piece of bright blue green Tourmaline rough that will cut a nice stone. it has an open C axis meaning it will cut a very nice and bright gem.
This stone is very clean inside. The skin has some small inclusions that will easily be removed.
The tourmaline is a unique miracle of colour. The gemstone comes in green, red, blue, yellow, but there are also colourless specimens and black ones. Often two or more colours are found in a single tourmaline crystal. Also rare and very highly esteemed are tourmalines which appear to change their colour and cat’s eye tourmalines. Having said all that, green is regarded as the classical tourmaline colour.