What immediately jumped into my head was a blazing star (lone star, radiant star - lots of different names) - I can so see these colours making up into a spectacular shimmering star!
Here's a link to a spectacular sample:
http://quiltingal.xanga.com/?uni5855...%3A39%3A57.033
<no affiliation, but do have her 'Star Struck Quilts' book - fabulous!