What do you need to know (meaning understand, not just memorize) to do spectacularly well on Quiz 7? The essential terms and concepts are listed below. Writing out answers to each of the following would be an excellent way to prepare.
fashioning, lapidary, tumbling, sawing, lap, wheel, apex, tablet, bead, half-drilled, full drilled, briolette, rondel, engraving, carving, flex shaft, fixed arbor, intaglio, cameo, scrimshaw, reverse carving, hololith, representational, stylized, abstract, faceting, brilliant cut, step cut, mixed cut, fancy shape, buff top, concaved cut, fantasy cut, rose cut, critical angle, window, yield, jamb peg faceting machine, modern faceting machine, dop stick, protractor, index gear, mast, native cut, custom cut, make, faceting diagram, natural, grain, marker, sawyer, cleaver, bruter, bearded girdle, blocker, brillianteer, scaife, bort, tang.
What is fashioning, examples of uses of unfashioned gems, lapidary vs diamond cutter, general history of lapidary, equipment and techniques for various lapidary processes: tumbling, sawing, grinding and polishing. Difference between lapidary saws and most other kinds. Wheels vs laps, basic techniques and equipment for cabochon cutting, and gem carving. Styles of cabochons with examples. Beads making, uses and styles. Use of flex shaft vs fixed arbor (technique), styles of engraving and carving with examples (intaglio, cameo, scrimshaw (materials used), surface and reverse carving, hololiths vs abstract vs stylized vs representational. Faceted gems: shape, cutting styles (typical and variations), basic time table for faceting. Purpose of crown vs pavilion, importance of critical angle, relationship between RI and critical angle, windowing. Three factors controlled by a faceting machine, yield vs other considerations in faceting, dops, adhesives, index gears, faceting diagrams, cutting vs polishing laps, native vs custom cut gems. Cutting colored stones vs cutting diamonds (skills), why is a small natural on a diamond's girdle a good thing?, diamond cutting equipment and personnel, diamond cutting centers.
Danburite, lapidary, chiastolite, chrysoprase, apatite, carnelian, hydrogrossular, Bruneau jasper, covellite, cuvette, briolette, intaglio, scrimshaw, scrimshander, baleen, hololith, jamb peg, bort, sawyer, bruter, scaife.