This is a transparent aventurine sapphire blue with
big, glittery dichro-like sparkles. Great for layering. In the images you can see a pair of marbles featuring the Blue Stardust over Pink Cadillac (033-018) and over Super Canary (033-022, temporarily out of production.)
The usual cautions against long, hot garaging technically apply since
this is an aventurine color, however it is highly
stable in implosions, encasements, and virtually any application.