This bead was handmade by me!
It is about 1 1/2"in diameter, and weighs about 5/8 oz, or 19g.
The Sputnik series are made hollow, of clear glass, bumps and all. The hot bead is then covered in a single color of powdered glass, after which various colors of powdered glass are sifted on the beads from various directions, resulting in a color-shifting affect. After the bead is annealed to room temperature, I grind and polish some of the bumps, which create lenses that allow you to look inside the beads. Each bead takes a lot of work, and the effect is quite mysterious. I really like making these.
Sputnik : Medium Red/Yellow/Green/Blue
These beads are made from Effetre glass from Murano, Italy, and are individually hand sculpted in the 4500˚ F/ 2480˚ C flame of a torch. Each bead is carefully annealed (a controlled cooling to alleviate internal stress in glass) and because of their design and shape, they are surprisingly strong. Each bead is unique; you will get the individual bead that you select.