A little sediment in the wine, the so-called tartrates or wine diamonds, is no reason to panic. Actually, the presence of tartrate crystals is viewed by many winemakers, sommeliers and academics as a sign of quality, indicating that the wine was not over-processed. Wine crystals never impart an unpleasant taste.
The main thing before use: do not forget to pour the wine carefully into the decanter to get rid of the sediment.
