Crystals like sugar appearing in white wine

[monagt]

White wine in fridge has loads of crystals appearing.
When left standing they fall to bottom and form into large crystalline shapes and when poured they stick to the sides of the glass.

Can anyone tell me why this has happened as I have never seen it before

M

 

[Marion]

I had no idea but I found this:

[broken link removed]

Possibly, they are potassium-bitartrate crystals as stated in the article above.

The good news is - they are not harmful.

Marion

 

[monagt]

Thx Marion, thats them all right. Never seen them before so was gonna throw the wine out.