Presidium Electronic Gemstone Gauge

This Presidium® electronic gemstone gauge accurately measures loose or set stones—even those with deep girdles or set in deep mountings—and instantly converts millimeters to carats. An easy-to-read digital display indicates ID and OD from 0–25mm with 0.01mm accuracy, and the gauge includes a jewelry attachment for measuring depths of stones in settings. It features auto shut-off to conserve battery use. A 3-volt battery, protective case, and gemstone weight estimation table are included.

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Dimensions: 97 x 61 x 16mm
Accuracy: 0.01mm
Range: 0–25mm
Brand: Presidium
Shipping weight: 12.731 ounces (360.907g)
Country of origin: Thailand