Presidium Electronic Refractive Index Meter II Southwestern uniform in thickness

uniform in thickness

White zircon is the birthstone for April

Each measures approximately 3 x 3 mm (1/8" x 1/8")

31/2" in length

Presidium Electronic Refractive Index Meter II Southwestern uniform in thicknessPresidium 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