Standard Wire and Sheet Gauge

With measurements in mm and inches.

Holes are used to measure stones and extensions are used to measure mountings. Gauge has mm and carat measurements.

Allows you to estimate the size of diamond without removing it from mounting. Measure girdle diameter and use the conversion booklet provided.

K&B Diamond and Stone Gauge. Measures loose or mounted stones from 3 points to 4 carats. Birthstone chart on reverse.