A nifty easy-to-use analog gauge for measuring gemstone dimensions with ability to convert to estimated carat weight for round brilliant diamonds (up to 29 carats), without the need to dismount your mounted diamonds! The PDG also has an inner scale display for US ring size measurements.
Measures from 0.0 to 23.0mm
Accuracy: 0.1mm / Tolerance: 0.02mm with simple zero realignment
Analog gauge with mm/ct/ring size display
Patented anvil
Smooth slider mechanism
Portable and lightweight
Compact protective case included
Attachment for high setting jewelry provided
Presidium Gemstone Weight Estimation Table provided
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