Jo-Di Diamond Gauge W/Book Steamaster and the compact form factor

and the compact form factor fits easily in a pocket or apron

Slightly radiused face designed for the interior of rings

these drills combine excellent stock removal with a clean cut finish

or hand-operated setups

accurate center-finding at the jeweler's bench

Jo-Di Diamond Gauge W/Book Steamaster and the compact form factorThe Jo Di Diamond Gauge with Book allows professional jewelers to accurately estimate the estimated weight of a diamond without removing the stone from its mounting. Using measured width and depth values referenced against the included book, this gauge supports calculations for both round and fancy diamond shapes making it an efficient tool for appraisers, bench jewelers, and estate jewelry professionals who need reliable weight estimates without the