Presidium Diamond and Stone Gauge

This dual-face Presidium® stone gauge accurately measures loose or set stones—even those with deep girdles or set in deep mountings.
An easy-to-read dial gauge displays the conversion of millimeters and carats, and the gauge includes a jewelry attachment for measuring stone depth.
A protective case is included.

Specifications:

Brand : Presidium
Accuracy : 0.1mm
Range : 0–23mm
Modes : Carat, Millimeter
Country of origin : Thailand