7.7ct Pair of Pear Shape Cabochon Black Opals 14.2x10mm Vallorbe Swiss Classic Set of 5 Diamond Needle Files 10mm (blue & black)

10mm (blue & black)

Knurled handle for maximum grip

Color: Red + Orange

Min: 10 x 13mm

Main color: blue

7.7ct Pair of Pear Shape Cabochon Black Opals 14.2x10mm Vallorbe Swiss Classic Set of 5 Diamond Needle Files 10mm (blue & black)Opal 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