So now we understand what you need. If you are planning to use coconut shavings for snow, then the chemical composition will be a little more complex than a single type of molecule. Included with the essential oils already discussed, you would need to figure out the composition of the coconut pulp. I would suspect that it is some variant of cellulose, but that is only a guess on my part. There are many many compounds found in natural products, so you may be better off building your snow globe out of something man made. If I were working on this problem, I would look into finding a cheap polymer that can easily be identified, and has a density greater than that of the fluid I plan to fill the globe with. I would also make sure that the fluid would not dissolve the "snow" before I put the whole thing together.