23.50ct Freeform Triangular Shape Opal Doublet 30x24mm Durston Superior Hardwood Jewellers Bench This practical anemometer is portable

This practical anemometer is portable and useful for measuring Air Velocity (wind speed) and temperature

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

3/8" chuck and 8mm hex shank

or plunging view

23.50ct Freeform Triangular Shape Opal Doublet 30x24mm Durston Superior Hardwood Jewellers Bench This practical anemometer is portableOpal 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