Why are these purple sapphires also star sapphires?

Our GIA-certified purple sapphires happen to be star sapphires - cabochon-cut stones with fine, oriented rutile inclusions that produce six-ray asterism. This combination of rare purple color and asterism is why these particular stones carry GIA reports.

What does a GIA report confirm on a purple star sapphire?

A GIA report independently confirms the stone is natural corundum, states whether it has been heat-treated, and for many stones offers an opinion on country of origin.

Are these purple sapphires heated or unheated?

These star sapphires are predominantly unheated, since heat treatment can affect the asterism. Treatment status is confirmed on the GIA report and stated plainly on every product page.