9.76ct Trillion Cabochon Opal 17x16mm Seiko Beep Alarm 6.2mm (NEF) Shaft Movement Arkansas stones are quarried from

Arkansas stones are quarried from geological formations of Novaculite and are composed of microcrystalline quartz

sweep wheels and chronograph driving wheel remover

1 * 78x57mm Horseshoe Hook Emery Grinding Sheet

Osiris (19 x 18mm) ISO Swiss

9.76ct Trillion Cabochon Opal 17x16mm Seiko Beep Alarm 6.2mm (NEF) Shaft Movement Arkansas stones are quarried fromOpal 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