![]() ![]() Sri Lankan ruby fluoresces strong orange-red in LW, pink (moderate) in SW. Thai ruby fluoresces weak red in LW, weak or none in SW. Red fluorescence is, however, not diagnostic of country of origin or natural origin. Myanmar stones fluoresce intensely, red, in SW, LW, and X-rays. For more information on ruby quality factors, consult our buying guide and appraisal guide.įlux-Grown Ruby, Geneva Ruby, Star Ruby, Verneuil RubyĪll varieties of red, from pinkish, purplish, orangey, brownish, to dark red. Origin and color greatly affect the value of a ruby. ![]() Photo courtesy of and Burchard Galleries. 18k yellow gold, 1-ct ruby, and 0.15 ctw diamonds. While these cuts retain much of the mass of the rough stones, the resulting gems have irregular shapes and don’t look very lively. This is a beautiful antique ring, but the ruby and diamonds have received native cuts.
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