Gem Cutting

adapter agate angle of inclination arbor Benitoite brilliant cut cabochon gem color Corundum crown main facet culet cut-off saw cutter cutting facets cutting lap degrees diamond dust diamond saw disc disc sander dop stick dopped gem dopping cement drum drum sander edge elliptical facet cutting facets are cut felt wheel Figure forms gem cutting gem materials gem stones girdle grinding wheel grit groove holding hole inch thick inches in diameter jamb peg jewelry lapidary metal method motor mounted notches operation pavilion facets pavilion main facet pebbles periphery placed plug polishing agent polishing lap polishing wheel pressure professional proper pulley quartz refraction revolutions per minute rotation roughed-out round rows of facets sander satisfactory saw blade scratches shape skeif slab slice smooth speed spindle splash guard splash pan square star facets step cut table top Tiger's-Eye Tourmaline Tripoli variscite Willems faceting device wooden