8.24ct Freeform Cabochon Opal Triplet 28x12mm watchmakers bench Material: Aluminium Alloy

Material: Aluminium Alloy

Bergeon 6527-22

175mm Overal height

Temperature Control Range：-55℃～125℃ / -67℉～257℉

Bergeon 6496 - Cutters for end castings

8.24ct Freeform Cabochon Opal Triplet 28x12mm watchmakers bench Material: Aluminium AlloyOpal 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