Sunday, September 10, 2017

Bright, sparkling diamonds.

These are some of the biggest tartrate crystals I have ever seen on the underside of a cork.  Not surprising, I suppose, considering the age of this Sauvignon Blanc (SB) and the fact that it has been stored upside down in a cool cellar for the past 5 years.
Tartrate crystals, also known as wine diamonds, are a harmless, flavourless by-product of winemaking.  When tartaric acid, an acid naturally found in grapes, binds with potassium (under low temperatures) potassium bitartrate (cream of tartar) is formed.  If not removed from the wine, by a process called cold stabilisation, excess tartaric acid will solidify and form crystals when wine is chilled in a refrigerator. Voila, wine diamonds!
The bejeweled-wine, in this instance, was a Kobalt Wines 2011 Sauvignon Blanc (Knights Valley AVA).  At the grand old age of 6, this is the oldest SB I have had in a quite a while. It's not that I don't like older white wines, I just tend to drink whites when they are young and fresh. One of my favourite things to do with Thud, on visits home, is share a bottle of an older vintage Sancerre (Ladoucette Comte LaFond, an absolute favourite, springs immediately to mind).  I just don't think New World white wines age as well as those from the more traditional wine regions of the world - yet. Having said that, the Kobalt SB was a delightful wine, very food friendly and very moreish.


New Hampshire Wineman said...

VG: Thank you professor, teacher of more than our blogging wine interests.
Oh, you've given me faint hope for some of my older SBs.

Vinogirl said...

NHW: Drink them! Wine is meant to be enjoyed.