4610 Gemoro Digital Pocket Gemstone Gauge

The GEMORO SUREGAUGE XL provides the extra precision of 0.01MM you need. Includes a gem weight estimating book, high-setting attachment, and rubberized zippered carrying case. Used for estimating the weight of any shape diamond or gemstone (mounted or loose). Powered by (1) supplied LR44 (357) battery. TECHNICAL SPECIFICATIONS Measuring Range: 0-25mm/0-1” Precision Accuracy: 0.01mm/0.0005” Power: LR44 Alkaline Battery (Or 357 Silver Oxide) Environmental Conditions: Temperature: 0ºC-40ºC Relatively Humidity: ≤80% Storage Temperature: 14ºF – 140ºF  (-10ºC– +60ºC)