Diamonds can be produced from tequila.

Maybe you can use the worm as the ring band! From BBC:

A method of producing synthetic diamonds using tequila - Mexico's favourite alcoholic drink - has been discovered, scientists there say.

The amazing discovery was made by physicists from the National Autonomous University of Mexico, and could have many industrial uses.

There is one catch however. The synthetic diamond crystals are too small to be turned into jewellery.

[...] The head of the scientific team, Miguel Apatica explained to the BBC how they came up with their discovery. "First of all we turn the liquid tequila into vapour by using a lot of heat. The gas molecules are then broken up into tiny particles. Then we increase the heat even further - to around 800 degrees celsius."

"The end result is that we get carbon atoms which are then deposited in the shape of a very thin diamond film," he added.

The synthetic diamond crystals can only be seen under an electronic microscope.