Accurate Gemstone Setting Gauge Set of 18

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.

Carbide tipped measuring faces parallel, ground and lapped.
Stainless steel spindle for rust prevention, heat resistant grips and calibration is laser etched.