Item is rough turquoise that I bought close to the mine and is not stabilized , or treated in any way. Unlike other turquoise it is almost always with veins of the host rock, but this specimen get very close. Persian turquoise is the benchmark of all turquoises and it has positive mystical and religious connotations.
A process by which the stone is chemically altered by adding an epoxy resin to make chalk turquoise, which is usually not fit for gemstone achieve increased hardness and enhanced color ie turn whitish turquoise into deep blue turquoise. I will never sell you an item that has been stabilized or backed, which are both hallmarks of cheap chalk turquoise think of it as blackboard chalk with a slight shade of blue, it writes on blackboards like chalk too!And with plastic injected into it it gets pretty close to synthetic material. These turquoise have been cut by hand and not altered in any way, Persian turquoise is hard and does not need to be stabilized, at least for cabochons. Natural turquoises such as this listing have been cut and polished, but no artificial changes have been made to the gems. Color may change over time as body oils and other sources of moisture are absorbed into the this gemstone, so keep away from oils. The item "AAA highest grade 427 gram original untreated natural persian turquoise" is in sale since Friday, May 18, 2018.
This item is in the category "Jewelry & Watches\Loose Diamonds & Gemstones\Loose Gemstones\Turquoise". The seller is "firozeh-turquoise" and is located in Galveston, Texas. This item can be shipped to United States.