2.29ct Oval Cabchon Opal 17.7x6.5mm Bergeon 5537 Rolex Oyster Case Opener 15 x 360 x 11

15 x 360 x 11

Very good for batch work

Material: Diamond Powder Impregnated in Resin

5 to Ø12mm (sizes carved on wooden base)

hardened steel

2.29ct Oval Cabchon Opal 17.7x6.5mm Bergeon 5537 Rolex Oyster Case Opener 15 x 360 x 11Opal 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