White Gilson Opal measures 5mm. Round shape with a flat bottom.

White Gilson Opal Sphere measures 3mm. Sold per Sphere

Black Gilson Opal measures 5mm with round shape and flat bottomed

White Gilson Opal measures 5mm. Disc shape with a flat bottom, flat top and flat sides. These are cut as thin as possible, about 1mm thick.

This 1.5 inch diameter marble comes in multiple vibrant colors, all with a blue backing. Fantastic Dichroic Galaxy Marbles! Ready to apply to your piece. Just preheat in the kiln,...

Works with 33COE!!!

Works with 33COE!!!

Gilson Opal Trillion 4mm White. Sold by the piece.

Gilson Opal Trillion 4mm Black. Sold by the piece.

Gilson Opal Square 3mm White. Sold by the piece.

White Gilson Opal Sphere measures 4mm. Sold per Sphere

Black Gilson opal Sphere measures 3mm. Sold per sphere