The Blue Glass Heart Necklace Keepsake is made of stainless steel and glass. Each stainless steel urn comes with a 20" Box chain. This lovely glass heart can not be engraved, yet can serve as a keepsake reminder of a close loved one. Since the tiny heart is top opening for the insertion of ashes. It can hold 1/4" cubic inch of ashes. You can pick out the special color of your choice from a grouping of color choices. The colors range from Blue,, Black ,Yellow, Purple, Light Green and Pink.