Turquoise #9 | Pilot Mountain Opal Jewelry 5 to 4 on the

5 to 4 on the mohs hardness scale

The Stone: Lightning Ridge Black Crystal Opal

including cleaning

The Weight: 21

Split-shank style gives a more substantial

Turquoise #9 | Pilot Mountain Opal Jewelry 5 to 4 on theThe Stone: Turquoise natural stabilized The Weight: 61. 13 carats The Origin: Pilot Mountain Mine, Nevada The Cut: Freeform Cabochon Cut stone measurements: 32. 95mm x 21. 53mm x 13. 18mm About Turquoise: What once was regarded a common byproduct of copper mining is now realized to be a rather scarce gem. Typically found in or near copper mines around the world, turquoise from each locality differs in color, quality, character, and rarity. Certain