burgundy gone bad?

[Casta]

I purchased a bottle of
Gevrey Chambertin-1er cru la combe aux moines
(1996) a few years ago. I didn't notice at the time (or at least cannot remember) and have found some precipitation inside the bottle a few days ago. It does look like the fruit is inside, but would hate to see it go to waste. Any ideas out there? When should I open this one?