More ideas from ALEX
How to Drill Holes in stone, rock and pebbles.  This Infographic , although entitled How to Drill Through Glass uses the same rules for drilling though any kind of stone or rock including gemstones.

How to Drill Through Glass Infographic by Eternal Tools. 4 easy illustrated steps for use when drilling through sea glass, beach glass and fused glass. The principle is the same no matter what glass you need to drill through (except tempered glass)