title_body: What is this sediment from my wine?
upvoted_answer: This is most likely tartrate crystals that have formed around the cork or a seam on the inside of the glass bottle. The like to attach to something rough. I have seen this many times. More often in white wine than red because of the higher tartaric acid levels, but it can occur in both. Generally when the wine has been stored in a cold location for an extended period of time. Like in a cellar or fridge. Nothing to worry about! Here is a picture of white wine crystals that have a similar shape.