Presidium PGI Gem Indicator Belt Sanding long-lasting plate

long-lasting plate

For drawplates with individually marked and calibrated hole diameters

4-prong V-ends head for secure square stone presentation

This economical disc cutter set is designed for producing round disks from soft precious metals such as gold or silver up to 20 gauge thick

Presidium PGI Gem Indicator Belt Sanding long-lasting plateThe Presidium Gem Indicator (PGI) is the only handheld tester specifically designed for colored gemstones. Using advanced thermal conductivity technology, it can identify up to 31 different gem types and includes a color input function with 12 common gemstone colors for even greater accuracy. A clear digital LED screen ensures easy to read results, while the patented changeable probe tip delivers reliable, long term performance. The PGI is a