Symmetry is a very big consideration for a heart shape diamond. Because of its complexity of shape the diamond requires very skilled cutting to ensure brilliance.
With a heart diamond, like in the case of a pear shape diamond, it is important that there is an obvious heart outline where the lobes are rounded and not pointed and are well defined. Heart shape diamonds have many facets which makes the heart so dazzling and magnificent.
It takes a very skilled diamond cutter many years to learn the craft of cutting the groove between the two lobes of the heart shape diamond.
A heart shape diamond can be set as a pendant or if you are a hopeless romantic you may prefer the heart as your engagement ring. The diamond tip of the heart is the most fragile and extra protection is required when setting in jewellery especially for a heart shape that should be mounted in a special setting.