14k gold Reversible Open Heart Pendant

This is a stunning 14k gold Reversible open heart pendant. Its Ruby's and Diamonds on one side and Sapphires and Diamonds on the other. the photos do it no justice whatsoever. its stamped 14k on the top of it also has another number but I'm not sure its meaning. I'm asking $400 obo. its worth double that. this would make a great Christmas gift for a special lady. I do not have it on a chain.