7.7ct Pair of Pear Shape Cabochon Black Opals 14.2x10mm Diamond Grading Lamp Suitable for applications like fans

Suitable for applications like fans

Horotec "All Purpose" Tool - Complete

Ø12mm Base

serrated tips

Two window display testing

7.7ct Pair of Pear Shape Cabochon Black Opals 14.2x10mm Diamond Grading Lamp Suitable for applications like fansOpal 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