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The Presidium Duo Tester PDT is the only Gemmological instrument in the industry that can examine gemstones using both thermal and reflectivity testing
Jaw Length 13mm
When using this burr the girdle part of the burr will grove excellent results for channel and peg settings
Adopts the MCU and electrooptical technology for contact measurement efficiently
infrared decoding
9.23ct Round Faceted Emerald 15mm Chelsea Filter The Presidium Duo Tester PDTEmeralds lustre is vitreous, it rates 7. 5 8 on the Mohs scale but because of their many inclusions they are not ideal for everyday jewellery, unless they are set into pendants or earrings with secure settings that protect the stones. Columbia is known for producing the highest volume of emeralds and most importantly the finest ones. Other significant sources are: Zambia, Brazil, Zimbabwe, Afghanistan, India, Madagascar, Pakistan and Russia; Stone
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US$ 171600.00
