http://tinyurl.com/m5mb7ne<P>PRESIDIUM ELECTRONIC GEM GEMSTONE DIAMOND TESTER PGTProduct Review<P> Click on the link for more reviews<P>Uses thermal conductivity tests to detect diamond and simulants<P>Instant recovery in between tests<P>Color stone estimating function can be used with rough stones, mounted stones, and cut stones<P>Metal detector warns user when accidental contact is made with gem mounting<P>1 Year Manufacturer Warranty<P>
