cluster ring
A ring made up of many little stones that are fused into some huge shiny "exploding" shape, such as a star, a heart, a circle'diamond/square/, and even a (yuck! how mainstream!) flower. The cooler shapes are now worn by some very "on-the-edge" punk rockers/indie people/freaks.
I bought a multicolored glass cluster ring in the form of a green and red diamond.