Presidium Electronic Refractive Index Meter II Gift Boxes - Assorted One 14 mm sterling silver

One 14 mm sterling silver heart toggle clasp with a 25 mm long bar

2 Mandrels with 1/4" shanks

It measures approximately 7 3/4" x 6 3/4"

class rings and other wide rings

Presidium Electronic Refractive Index Meter II Gift Boxes - Assorted One 14 mm sterling silverPresidium Electronic Refractive Index Meter II DESKTOP DIGITAL TESTER THAT USES REFRACTIVE INDEX TO QUICKLY SEPARATE GEMSTONES, DIAMONDS, MOISSANITES AND OTHER DIAMOND SIMULANTS. BY MEASURING THE QUANTITY OF LIGHT REFLECTED THROUGH THE STONE, THE PRESIDIUM REFRACTIVE INDEX METER II (PRIM II) IS ABLE TO SEPARATE DIAMONDS, MOISSANITES AND OTHER COLORED GEMSTONES VIA THE REFRACTIVE INDEX (R. I) OF THESE POLISHED GEMSTONES. UNLIKE A TRADITIONAL