Turquoise has been mined in the Kingman area for over one hundred years. The story is told in Turquoise in America Parts 1-3. Dark web spiderweb was first recognized on Ithaca Peak and has been a distinctive Kingman look, very rare as natural.
 
These three stones of Kingman weigh 39.7 carats. The larger cab measures 3cm X 2cm. They are not treated and are backed. The retail price for this grade is $80 a carat. These are priced at wholesale discount at $50 a carat or $1,985.I have assigned a TG of 91 GG. These come from the Wayne Nelson Collection and were purchased by Wayne Nelson during the mid-eighties in Kingman.