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Presidium Gemstone Dial Gauge (PDG). Analog gauge for measuring gemstone dimensions, converts to estimated carat weight for round brilliant diamonds (up to 29 carats). Also displays US ring size measurements.Measures from 0.0 to 23.0mm. Accuracy: 0.1mm / Tolerance: 0.02mm with simple zero realignment. Portable and lightweight. Compact protective case included. Attachment for high setting jewelry provided. Presidium Gemstone Weight Estimation Table provided.
| Category | Toys & Collectibles > Collectibles & Hobbies > Rocks, Fossils & Minerals |
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