This listing is for a triangular spiderweb turquoise. The dimensions of the stone are 18 mm x 40 mm I've 5 mm deep. The weight of the stone is 28.5 carats.
This stone is backed. And is well-made with a beveled edge on top. I don't have a lot of information on the stone. I'm sure I purchased it years ago because of the unique Color that it is. To the best of my knowledge I believe that it is natural and untreated. The origin of the mine is most likely somewhere in the south west. Nice unique gemstone.