palladium plating
61Carnelian — For other uses, see Carnelian (disambiguation). Cornelian redirects here. For other uses, see Cornelian (disambiguation). Sard redirects here. For other uses, see Sard (disambiguation). Carnelian / Sard Polishe …
62Chrysoberyl — General Category Oxide minerals Spinel group Chemical formula Be …
63Opal — For other uses, see Opal (disambiguation). Opal An opal bracelet. The stone size is 18 by 15 mm (0.7 by 0.6 in) General Category …
64Turquoise — For other uses, see Turquoise (disambiguation). Turquoise Turquoise (tumble finished) one inch (25 mm) long. This pebble is greenish and therefore low grade General …
65Engraving — A copperplate engraver at work Engraving is the practice of incising a design on to a hard, usually flat surface, by cutting grooves into it. The result may be a decorated object in itself, as when silver, gold, steel, or glass are engraved, or… …
66Watch — For other uses, see Watch (disambiguation). Early wrist watch by Waltham, worn by soldiers in World War I (Deutsches Uhrenmuseum, Inv. 47 3352) A watch is a small timepiece, typically worn either on the wrist or attached on a chain and carried in …
67Redox — Illustration of a redox reaction Redox (portmanteau for reduction oxidation) reactions describe all chemical reactions in which atoms have their oxidation state changed. This can be either a simple redox process, such as the oxidation of carbon… …
68Crown (headgear) — The Imperial State Crown of Great Britain, Tower of London. It incorporates the Black Prince s Ruby , a 140 ct. Badakhshan spinel. This image of the crown was taken prior to the 1953 coronation, when the crown was modified for Queen Elizabeth II …
69Copal — For other uses, see Copal (disambiguation). Copal from Madagascar. With spiders, termites, ants, Elateridae, Hymenoptera, Cockroach and a flower …
70Jade — Nephrite jade redirects here. For nephrite itself, see Nephrite. This article is about the gemstone. For other uses, see Jade (disambiguation). A selection of antique, hand crafted Chinese jade …
