0.77 ct Black Colourplay Oval Chatham Grown Opal green-gold there were very few diamonds

there were very few diamonds in the world and those that existed came mostly from India and Brazil

one leaves the original patina in order to keep it as original as possible

and 8 mm wide versions

and may not have traceability information for these gems

for example

0.77 ct Black Colourplay Oval Chatham Grown Opal green-gold there were very few diamonds0. 77 Carat Weight Black Colourplay Colour Oval Cabochon Cut Dimensions: 8 (approx) x 6. 13 x 2. 61 mm Laboratory Opal Brand: Chatham Lab Report: None Chatham provides a Lifetime Warranty on their gemstones "That famous Chatham quality is no accident: its the result of continuous technical refinement over our 75 year history. It starts with carefully controlling the gem crystal growth process but it doesnt stop there. Our master gemstone cutters