Turquoise colored glass bubbles can be introduced into jewelry by fusing copper oxide powder between layers in a fusing kiln.
Please visit the copper oxide page for additional information on using this material.
The following pendant has been made by sandwiching copper oxide powder between layers.
When fused in a kiln the copper oxide will change to a turquoise color and bubbles will spread between the layers.
Copper oxide is available from ceramic and pottery supply stores.
Stringers have been fused to the top layer.
Bubbles may come through far enough to bend some of the stringers.
Instead of stringers, confetti or dichroic glasses can be fused to the top layer.
It is sometimes easier to tack fuse items to the top layer before adding powder to the base.