Can set upper and lower limit
3M HD CMOS Sensor
The most advanced and professional watch case snap on back opener on the market
Measuring Range: -32°C ~ 530°C / -26°F ~ 986°F
Some rubies display the gemmological phenomenon called “asterism” where cabochon-cut stones have a whitish star on top of the dome
2.13ct Rectangular Cut Tourmaline 9.2x6.3mm Menzerna G52 full Bar (1.2kg) Can set upper and lowerTourmalines are found in a wide range of colours, pink, green, blue, orange, yellow, brown, black, and colourless. Bi coloured Tourmalines are also common and stones which are coloured pink to green are known as watermelon tourmaline. Tourmalines can also display cat's eye chatoyancy, which is caused by parallel fibres running through the stone.; Tourmaline is found in many countries including Madagascar, Brazil, USA, Burma, Sri Lanka, Botswana and