39.94ct Boulder Opal 39x18x5.7mm Durston Superior Hardwood Jewellers Bench Set of 4 diamond coated

Set of 4 diamond coated burrs

humidity from 20% to 85%

Size 07 Millgrain Wheel

Replacement Sole Plate

Head Ø9mm

39.94ct Boulder Opal 39x18x5.7mm Durston Superior Hardwood Jewellers Bench Set of 4 diamond coatedOpal 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