dynagem

The GemPen Filters are to be used as Add On Filters to be used with the GemPen Diamond Screener for testing and verifying Diamond, Rubies and Sapp...

The GemPen® provides professional users with the means to efficiently determine whether a diamond, ruby, or sapphire is natural, synthetic (man-mad...

3 Bottle Kit: White - Amber - Blue Three bottle tester, tests for all carats of gold and also silver.Each acid changes colour when applied to the m...