“Floating opal” is a term applied to chips of opal suspended in
glycerine, usually contained in a small (~1/2") glass sphere.
If you can get the container open without damaging it, you want to
replace the missing liquid with new glycerine. I was recently able to
order some through the pharmacist at a local Walgreens pharmacy.
They don’t stock it, but can get it on request.
Glycerine is also great for wax work. You can apply glycerine to a
stone or crystal, then dip it in hot wax or apply hot wax to it, and
the wax won’t stick to the stone. You can also apply glycerine to a
piece of flat glass to prevent wax from adhering.
All the best,
Sebaste Studio and
Carolina Artisans’ Gallery
Charlotte, NC (USA)