Menthol Rings, Spontaneously Formed

I don't know exactly why or how these formed.They formed on the walls of a vial containing melted menthol.They seemed to form whenever the melt was cooled quickly, and they eventually became cloudy from crystals forming in them.

Flickr page for this photo.

Visit the Eye for Science Flickr group.

Get the "Eye for Science" widget here and install it on your own blog. Spread the scienticity!

Like this image? Want it for your smartphone wallpaper?
Use this QR Code to load it on your smartphone and enjoy!