What is this in my wine??

[Maddaddam]

The wine is an Australian cab-merlot juice that I picked up from my local wine making shop. I added the raisins and oak chips that were included with the juice.

It's almost like a fine grit and is in every bottle. Is it sugar crystals? Raisin seeds? Or maybe leftover from one of the packets that came with the juice.

Thanks in advance!

 

[RPh_Guy]

Crystalized tartaric acid salt (i.e. potassium bitartrate or "cream of tartar")

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