Presidium Gem Tester II Krohn Fretz T-101 Double Ended Stake

Fretz T-101 Double Ended Stake Holder (112

Mountings are supplied in standard USA ring sizes 6–7

Double cut on all four sides for efficient stock removal

Each graver is paired with a wood handle

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Presidium Gem Tester II Krohn Fretz T-101 Double Ended StakeIs 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