Nate Thatcher, better known as Grandpa, demonstrates how to encase opals that have advanced shapes, such as stars and skulls, without trapping pesky air bubbles. Techniques for pushing the opal into the glass and surrounding it in the tubing are included. The importance of correct annealing times when using opals is also covered.

This article was originally published on page 38 in the Summer 2014 issue of The Flow.

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