Round Genuine Ruby Cabochon Select Stone Size:4mm Properly hardened and expertly machined

Properly hardened and expertly machined steel construction

755 Busch Knife Edge Bur 1

Master container holds 6 inner 72-piece slotted bur holding boxes

small-to-medium engraving work

Hole Shape Hexagonal Number of Holes 31 Largest Hole 9 mm × 9 mm Smallest Hole 6 mm × 6 mm Material Hardened steel Origin Italy Compatible Metals Gold

Round Genuine Ruby Cabochon Select Stone Size:4mm Properly hardened and expertly machinedKnown as the King of Gems in Sanskrit, ruby is one of the most desired and valuable gemstones, prized as far back as biblical times. Ruby is the most valuable variety of corundum and commands the highest per carat price of any colored stone. The trace element chromium is responsible for ruby's characteristic color, which ranges from orangy red to purplish red. Pure, vivid red to slightly purplish red is considered the most desirable and highest valued