Have you ever come across what appear to be white flakes floating in your bottle of wine? Did you assume that this snow-globe appearance somehow meant the wine was flawed or ruined?
What you had most likely seen are tartaric crystals, commonly referred to as “wine diamonds” or Weinstein (“wine stone”) in German speaking countries. So do these wine diamonds signal a bad bottle of wine?
Opinions about this issue are divided and the reason is simple: you have bought flawless wine, but you have not bought aesthetically flawless wine. Depending upon where you are from, this can matter to you more or less.
The American wine drinker is not used to finding wine diamonds in their bottles. Here, most wines undergo a cold stabilization process, which is when a wine is cooled down before it is bottled so that the white flakes, called crystallized tartaric acid, “fall out” and can be separated from the wine. But what price beauty? Cold stabilization influences a wine’s balance and taste: as some winemakers put it, the wine is actually being ripped apart, and the rapid cooling changes the wine’s colloidal structure. One might call it a clear case of style over substance. Continue reading “Tartaric Crystals in Wine: the "Wine Diamonds" of Quality”