I made this focal "bead" using several layers of clear dichroic glass, and sterling silver wire. It measures 2-1/2 by 1 inches (6.5 by 2.5 cm). You could use it as a pendant all by itself, or you could use this as a centerpiece for your own custom beaded necklace.
The sturdy sterling loops are fused/melted into the piece, not glued... so, you don't have to worry about them coming loose.
Dichroic glass has a beautiful ability to change color depending on lighting and angle of view, similar to natural opals. The color it reflects and the color it transmits can be totally different. As with most glasswork, photos don't really do it justice... so, I just took as many pictures as possible.
I consider the photo above to be the most "typical" view, but wanted to provide these others for reference.