7.7ct Pair of Pear Shape Cabochon Black Opals 14.2x10mm Diamond Grading Lamp mechanical watch works that need

mechanical watch works that need to be winded in one direction only can be tested

Handle Daimeter 35mm

Potentiometer knob can change the output duty cycle of controller and then change the motor speed

Size: 90 x 90 x 30mm

Water Shortage Alarm: No

7.7ct Pair of Pear Shape Cabochon Black Opals 14.2x10mm Diamond Grading Lamp mechanical watch works that needOpal is probably the most famous phenomenal stone displaying the unparalleled play of colour, a rainbow coloured kaleidoscopic effect. The name opal derives from the word 'opalus' given by the Romans, which is Latin for 'precious stone'. They can be fragile which makes it more suitable for jewellery such as necklaces, brooches and earrings that are less likely to be knocked. Opal is the birthstone for October. Mohs Scale of Hardness: 5. 5 6. 5