Последние добавленные видео:
Gemstone-Testing
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4 years ago
220984 4 years ago 20:275 Simple Gem Tests Anyone Can Do | Unboxing
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1 year ago
29375 1 year ago 18:09Easy Gem Tests Gemologists Actually Use
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2 years ago
90792 2 years ago 5:51The Most Essential Gem Tools You Should Own
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10 months ago
2967 10 months ago 9:43Can You Identify Jade with a Presidium Gem Tester?
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4 years ago
49036 4 years ago 12:01Gem Tools: Refractometer
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7 years ago
46876 7 years ago 1:12Gemstone tester testing Ruby, Blue Diamond and Emerald Jadeite Jade
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3 years ago
10684289 3 years ago 24:02Jade Hunting, How to "Identify" and "Test" Jade!
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6 years ago
217134 6 years ago 18:24Presidium Gem Tester II (PGT II) - Testing Emerald, Diamond, Sapphire, Ruby, Nephrite
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5 years ago
26765 5 years ago 2:13GIA iD100® Gem Testing Device
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3 years ago
173163 3 years ago 3:37Diamond Selector 2 II Diamond Tester From AMAZON - Demo How To Use and Test For Diamonds