WENZHOU KEFENG INSTRUMENT CO.LTD is a company specializing in the gem testing and
instrument, it incorporate produces, researches and develops, sells into an organic
Diamond selector`MINI Diamond tester`Moissanite/Diamond tester`Diamond combo
tester`Digital gemstone gauge are the leading products of our company, the Moissanite/Diamond tester（ZL01264391.2) and Diamond combo tester(ZL0323624.1)are
Chinese patented product.