Transparent Multi-shape Diamond and Gemstone Gauge
This Gauge measures many shapes of diamonds, gemstones, etc. Made of clear plastic, it allows a more precise estimate of the weight of brilliant and single-cut diamonds, as well as marquise, emerald-cut, pear-shape, square-cut, straight and tapered baguettes in sizes ranging from 0.01 to 8 carat. Diameters are indicated in millimeter and carat size.