I guess it's too late for your stone, but for others...
You can put a stone in just about anything that will keep dust and dirt off. A zip lock bag, clean pill bottle, clean film can ... you get the idea. It is not necessary to refridgerate it or put it in any kind of liquid. Your doctor will send it off for chemical testing. Usually they are interested in seeing if it is a uric acid stone or a calcite stone. Anything that will keep it reasonably clean will do.
|