Harmless crystals of potassium bitartrate that can form in wine especially when a wine is chilled for extended periods of time.
Also called "wine diamonds", potassium bitartrate or cream of tartar, they are harmless crystals that separate from some wines during fermentation or aging. They result from a high level of tartaric acid (one of the main grape acids). They can be seen shining inside of just emptied barrels, and also on wine corks. To the inexperienced, they may look like cut glass, but they are completely harmless. Many wineries remove them by using a technique called cold stabilization.
Harmless crystals of potassium bitartrate that may form in cask or bottle (often on the cork) from the tartaric acid naturally present in wine.
harmless crystals that separate from some wines during fermentation or aging. They result from a high level of tartaric acid, and can be avoided through filtration and stabilization methods.
These are also referred to as wine diamonds and are crystals that look like salt or sugar in a wine bottle. They are harmless and a sign of a good wine. It is just tartaric acid that has changed into potassium bitartrate.
Beautiful, natural and totally harmless crystals that often form in the cask, in the sediment and on the corks of naturally made wines. These deposits come from the tartaric acids present in wines; though they look like cut glass, they are totally safe. In fact, they are a positive indication to experienced tasters that a wine has not been overly processed.
