For calibres ETA 2892
Carat points 1/2 to 50 for checking the size of the stone seat
Temperature Compensation: 0℃ ~ 60℃ (32℉ ~ 140℉)
Replacement Mechanical Microphone for:
Suitable for drilling ceramic tile
2.94ct Octagon Cut Tourmaline 8.4x7.3mm Harald Schneider Loupe For calibres ETA 2892Tourmalines 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