Bronze and red glass... what a beautiful reaction it makes. The black halo around the heart was created by that reaction. This is a 1 of a kind pendant. It will make the perfect gift for your sweetheart. The heart is fused between 2 layers of hand cut glass which was then fused at 1480 degrees for 8 hrs. It measures 1 inch x 1 inch. It has a silver tone bail and comes on a black cord necklace. The necklace has a 2 inch extender.