23.50ct Freeform Triangular Shape Opal Doublet 30x24mm Durston Superior Hardwood Jewellers Bench Operating Temperature: 0-50°C

Operating Temperature: 0-50°C

3/8" chuck and 8mm hex shank

Storage Temperature: -10~50°C (relative humidity<85%)

Display type: 0

60mm (Grey)

23.50ct Freeform Triangular Shape Opal Doublet 30x24mm Durston Superior Hardwood Jewellers Bench Operating Temperature: 0-50°COpal 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