USE 12.73 ct. Marlborough Green Chalcedony, 12.73 ct. Cabochon, Master cut Top Quality

Marlborough Green Chalcedony, 12.73 ct. Cabochon, Master Cut Imperial Green Shape - Round high dome slight beveled base for high end mounting.  Weight - 12.73 carat Size - 13.9 x 13.9 x 8.4 mm Color - Apple Green with expected slight blue hue. Clarity - Translucent Luster - Exceptional Origin - Marlborough Australia Treatment - None  Hardness - 7 Notes - Marlborough green chalcedony / chrysoprase was wiped out by the high-end jewelry industry and collectors especially Van Cleef & Arpels and China in the 1970's due to it being a dead ringer for the highest-end jadeite (Imperial to Apple Green) hardness is excellent  and pieces of this vintage jewelry even with conservative amounts of the chalcedony and no diamonds, set in platinum or gold sell for prices starting at about 16,000 USD and often exceeding 100,000.00 USD. Rare, true investment gem. Our gems are from our rough and are cut by award winning American gem-cutters. No mass production the material is simply not available. HE