Gem Refractometer Utilizing lenses and prisms to project a shadow line into a small glass internally.
The refractive index is seen through the view finder. 1.31 – 1.81 RI.
The index is used to identify the authenticity and quality of gems.
Built in light source ( uses 3 x LR44 batteries not supplied)
Testers have been subjected to thorough and extensive laboratory tests, and will generally give a clear and reliable reading of the stone, gemstone, gold or diamonds being tested under proper use. However, you are advised to conduct further supporting tests.. Cape Watch Tools & Jewellery Supplies shall not be responsible for any damage or loss resulting from the use of testers or handbook, and under no circumstances shall we or its manufacturer or any of its subsidiaries, licensors, distributors, reseller, servant and/or agent be liable for any direct or indirect damages, resulting from the use of this tester. Dealing in diamonds and gemstones requires a minimum qualification of which attainable though various appointed institutions ( http://www.gemlab.co.za/courses/)