4.47ct Octagon Cut Tourmaline 13.5x4.5mm Jewellers Microscope Humidity Range: 10%-95% RH

Humidity Range: 10%-95% RH

maintenance & test

Left & right double eye patches magnifier/loupe with adjustable LED

Good toughness and hardness

Weight: 100g

4.47ct Octagon Cut Tourmaline 13.5x4.5mm Jewellers Microscope Humidity Range: 10%-95% RHTourmalines 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