4.59ct Oval Cabochon Black Opal 14x10.8mm Dumont Swiss Brass Tweezers 46 x 1041 x 32mm

46 x 1041 x 32mm 400 Day

Head length 100mm

Ø40mm Case Holder

8" x 1½" Medium (6 Lap)

Refractive power 40dpt

4.59ct Oval Cabochon Black Opal 14x10.8mm Dumont Swiss Brass Tweezers 46 x 1041 x 32mmOpal 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