Those are spectacular but the likelihood of us running across is rare. They are for sale almost never and if we happen to have a shot at them for some magical reason, open the vaults!
I still see 5 distinct colors in the subject marble to make it a good Sparkler, IMHExperience. It is better than many I've seen at shows and on eBay! I've been trying to find one and not spend a fortune but I want to have a decent example of one!