C-Master measures range of the gemstone from melee to taper (maximum 25mm loose stone). It measures pearls or any metals. It can measure the length, width, and depth of the gemstone with ring. It can also measure the caratage of the gemstone even if it is set on a ring.

Operation is simple. Just select the type of gemstone and its shape, take the measurements, and the C-Master calculates the weight of diamond, corundum (sapphire, ruby), emerald, and alexandrite stones in round, oval, marquise, square, and cabochon cuts. Its compact size, 7.1" x 0.7", makes it convenient to take with you. The C-Master is made in Japan and operates on a button battery.

Made in Japan.

Features:

• High accuracy (Instrumental Error ± 0.01mm)
• Automatic calculation of caratage
• Can be connected with your Computer
• Budget price and high performance
• Flat gauge head and body
• User friendly design
• Easy to replace gauge head

Specifications:
Measuring Range:  0.01 ~ 25mm / 0.0005 ~ 1in.
Power Supply:  Button battery (CR2032)
Function:  Caratage, Flat Surface, Data Output, mm/in
Weight / Length:  160g / 54mm W x 155mm L x 18mm H
Instrumental Error:  ± 0.01mm
Option:  Data Output Tool, Connection Cord