Whenever I make a stained glass piece if I can put a jewel in it, I do! Faceted glass jewels are always great to add that special 'zing' to projects. What I love about them is that when light is transmitted thru a jewel there are literally dozens of rays of light! It's the same principle as with bevels. Each facet of a jewel or a bevel becomes a possible point of light. Strategically placed where the jewel will have morning or evening sun will give you a light show that you won't believe.
These vintage 20mm double faceted glass jewels are from my private stash and I've had them for decades. I have one set of Light Amethyst that has five jewels, and two sets available of the transparent Black Diamond jewels that each have six jewels.
Current sets available:
Light Amethyst - (1)
Black Diamond - (2)