GAMBLE!!! 169cts -Australian Solid Lightning Ridge Black Opal! This has a ton of color and a mix of Untouched Gamble Stones with Rubs that have exposed REALLY good color.This comes from a 1000ct bag I brought in that has been parceled out. Large Untouched Black Opal - potential for a Nice Stone out of the untouched & some guaranteed very nice black Potch for doublets. Also included some nice Doublet material for tops with lots of color. As an FYI - This is how I purchase from the mine in Australia. I buy large quantities of Gamble selection... sometime it hits.. sometimes not but it’s priced to (at a minimum) get your money back + Some. So this is a gamble more so in the sense of - will you get a fantastic stone. This is a good investment regardless!