Hearts and Arrows
‘Hearts and arrows’ refers to the pattern that can be viewed on a virtually perfect Round Brilliant diamond. It is quite remarkable. If you look at this diamond cut using a special viewer from the top, eight arrowheads are visible. If you look at the pattern from the bottom, hearts can be seen. This was discovered in Japan in 1980 when assessing a diamond of perfect symmetry. They become highly sought after, and in the 1990s their popularity moved onto the US.
These diamonds are exceptionally rare. In fact, it is believed that less than one per cent of Round Brilliant diamonds boast such incredible symmetry. Since this discovery, a special hearts and arrows viewer has been released onto the market to help decipher a diamond’s optical symmetry.