Presidium Gem Tester II Ring Mountings Compatible with ring cutter blades

Compatible with ring cutter blades 148

The included 2-sided single-line block dial features large upper case slanted type on one side and smaller upper case non-slanted type on the other

tempered steel Shape Narrow oval (60% ratio) Taper Angle 17° Hole Size Range 4 × 2

Sangers® Emery Inside Ring Shells are designed to smooth and polish the insides of rings with precision and ease

Cohler Superblack Black Rhodium Plating Solution is a pre-mixed

Presidium Gem Tester II Ring Mountings Compatible with ring cutter bladesIs it a diamond or moissanite? Ruby or garnet? Sapphire or tanzanite? Emerald or jadeite? The Presidium Gem Tester II (PGT II) provides fast, laboratory proven answers for jewelers and gemologists working with both mounted and loose stones. This professional grade color stone estimator eliminates human error in gem identification by measuring the rate at which different gemstones conduct heat a physical property unique to each stone type. Simply touch