
When viewed through a special gemscope from the bottom, these round diamonds will show a pattern of hearts (top). The arrows are seen from above. They are tougher to make out in the second picture below so I have highlighted a couple of them to make it easier to spot them.

They were introduced into the North American market in the 1990's.
References
- All about Hearts and Arrows Diamonds including pictures of the special viewer
- How they grade the hearts and arrows
Original Post by THE BEADING GEM
Jewelry Making Tips - Jewelry Business Tips
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