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All genuine Optima Gem products come with our certificate of quality and authenticity upon request. Fine Cut = Precision cut or visually imitates a precision cut. These stones have equal and symmetrical faceting with proper cutting angles (critical angle') and depth. Depth is between 60% and 70% of size listed. Size can vary +-0.1mm. 2-3mm (millimeter) gems are very small - less than 1/8 inch. AAA = eye clean, any inclusions will not be visible to the eye.
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