I had a chance to watch a demo using a new product EASY MARBLE.
My thought was, wouldn't this be fun used on cabochon shaped ( flat, smooth, round and smallish ) rocks. You would need to set your newly marbled rock in a bezel and create a one of kind "gem stone" pendant.
Next you could design the pendant in a way that that you could create Shrinkets beads that matched the marbling hang them off the pendant .
I found a good price on line at Jerry's Artarama
On the subject of "Marbles " Is Kimberly of
A Kimberly Design . She is a needle point artist and this is her take on marble design ( round ones ) .
How fun to use these colors and patterns on SHRINKETS beads . You could also add them to needlepoint art.