Natural Nevada Spider Web turquoise cabochon, 69.8 cts. Large, Light blue turquoise with light spider webbing, from the 'Blue Spider' turquoise mine, Folks, real , natural spider web turquoise is rare and its not  cheap. If some of the stuff I see for sale as spider web turquoise was real "I" would buy it for the prices they are listing it for, guess what,  most all of it is junk . Most all my turquoise is backed for strength when set into jewelry. ALL turquoise is mined and cut in the USA, no treating, stabilizing or outright fake turquoise. Be very careful of the many 'to good to true' deals on the internet. Real natural turquoise is becoming very scarce. Most of the material I see for sale are outright rip offs. I have been in the turquoise business for over 50 years and it hasn't changed much, let the buyer beware. I personally mined most of the turquoise I will be selling and if I did not, I know the miner that did.  My remaining inventory will be sold here on Ebay, many very rare and high grade stones will eventually be made available, some one of a kind. Also be wary of "certified", by who? Several of these "companies" are somewhat loose with their certifications ($)...All my orders are shipped by Insured Priority Air Mail, USA only, FREE....