Jewelry, Gems, & Minerals/Is this some type of diamond
Dr. Uwe Kackstaetter wrote at 2013-04-13 18:38:54
Diamonds are extremely hydrophobic, which means water will not stick to them. There is a quick diamond test. Clean the suspected diamond really well with soap, water and afterwards even alcohol or aceton (nail polish remover) to remove any traces of body oils from handling the stone. Do not handle your specimen any more with bare hands but use tweezers or wear latex cloves. Place the suspected diamond in a dish and carefully add some destilled water to the dish until the water level covers about 1/2 of your stone. Take a handlense and observe the water level line closely around your suspected diamond. On other surfaces, such as glass or other minerals, water will cling to the surfaces and crawl or curl up the sides of the stone. However, since diamonds are pure carbon, water will actually curl or curve downward, since your diamond repells water. But you need to be sure that there are no body oils on your stone or the test will not work.