There are old time diamond merchants and jewelers who believe they can accurately tell engagement rings size and quality with only a loupe, but we have found that they are often wildly off in their estimates.
diamond stud earrings were discovered to be carbon in 1796, and it took more than 150 years from that time until a method of butterfly ring synthesis was invented.
When diamond necklace is cut too shallow, light leaks out of the bottom, brilliance is lost and the butterfly ring appears watery, glassy and lifeless.