Colored diamonds are often much more expensive than colorless ones, while colored cubic zirconia will be around the same price as colorless cubic zirconia.
Diamonds are sometimes set in jewelry that is not solid gold, so this cannot tell you definitively if your piece is a diamond or not.
Smaller pieces of cubic zirconia may not be as brilliant.
You can also use a diamond tester that measures thermal conductivity if you have one. Higher thermal conductivity usually indicates cubic zirconia.
Use tweezers to pick your stone out of the water after you are done with your test so that you don’t lose it. This test will not work if your stone is set in a piece of jewelry.
If your piece is already set in jewelry, you will not be able to do this test.
You can buy small UV lights at most hardware stores.
This will be especially prominent if your piece is older.
Pieces of jewelry are harder to compare weights since they have metal that can make them feel heavier.
