Closeout Some Opalescence Australian 25mm x 18mm Oval Boulder Opal Otto Frei Material Tungsten Vanadium Steel Origin

Material Tungsten Vanadium Steel Origin Swiss Made Shaft Diameter 3/32" Piece Count 30 Storage Round plastic holder What's Included

Center rod and bending rods are steel construction

Keep your OptiVisor in service with a direct replacement headband assembly

but regular maintenance is important for optimal performance and longevity

8mm Top Width Range 4

Closeout Some Opalescence Australian 25mm x 18mm Oval Boulder Opal Otto Frei Material Tungsten Vanadium Steel OriginBoulder Opal forms exclusively in Queensland, Australia, where precious opal develops as veins and patches within rugged brown ironstone boulders. Over millions of years, rainwater dissolved silica from the earth's surface and deposited it into natural cavities within the ironstone host rock. The result is a gem of exceptional durability the ironstone backing provides natural reinforcement that makes Boulder Opal more resistant to cracks and fractures