Approved by China National Accreditation Board for Laboratories (CNAL);
Passed provincial metrological authentication and audition(CMA/CAL).
Jewelry and Jade Category: Expertise & naming of more then 100 kinds jewelry and jade such as ruby, sapphire, emerald, pearl, green jade etc.
Diamond: Diamond 4C classification (weighting, cutting, coloring and cleanliness), classification of studded diamond.
Content test of noble metal: the nondestructive test and chemical content test of gold decoration, platinum decoration, silver decoration etc.
