4.59ct Oval Cabochon Black Opal 14x10.8mm Dumont Swiss Brass Tweezers 320 meters cubed per hour

320 meters cubed per hour (air output)

The lacquered surface will not be plated and the Lacomit can be removed with Lacomit Remover once plating has been done

Refractive power 40dpt

8" x 1½" Medium (6 Lap)

4.59ct Oval Cabochon Black Opal 14x10.8mm Dumont Swiss Brass Tweezers 320 meters cubed per hourOpal 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