onyx-opal
61Moonstone (gemstone) — Moonstone General Category Feldspar variety Identification …
62Nose chain — A nose chain is a type of facial jewelry that originated centuries ago as a part of women s fashion in India. It has risen to prevelence as a recent introduction of gothic fashion and is now known for its use in several different subcultures… …
63List of ship names of the Royal Navy (O-Q) — This is a list of Royal Navy ship names starting with O, P and QMain A B C D F G H I L M N O Q R T U ZO* O1 * Oak * Oakham Castle * Oakington * Oakley * Oakville * Obdurate * Obedient * Oberon * Obervateur * Observer * Ocean * Oceanway * Ocelot * …
64Diamond flaws — Contents 1 External flaws 1.1 Blemishes 1.2 Scratches 1.3 …
65Centrifugal casting (silversmithing) — This article is about Silversmithing. For the industrial process, see Centrifugal casting (industrial). Centrifugal casting in silversmithing is a casting technique where a small mould is poured, then spun on the end of an arm. The centrifugal… …
66Colored gold — Ternary plot of different colors of Ag Au Cu alloys While pure gold is yellow in color, colored gold can be developed into various colors. These colors are generally obtained by alloying gold with other elements in various proportions. For… …
67Casting (metalworking) — Casting iron in a sand mold In metalworking, casting involves pouring liquid metal into a mold, which contains a hollow cavity of the desired shape, and then allowing it to cool and solidify. The solidified part is also known as a casting, which… …
68Precious coral — Corallium rubrum Scientific classification Kingdom: Animalia …
69Cufflink — Cuff with cufflink. A cufflink (also cuff link or cuff link) is a decorative fastener worn by men or women to fasten the two sides of the cuff on a dress shirt or blouse. The forerunner of today’s shirt first appeared in the early 16th century,… …
70Marcasite jewellery — Marcasite brooch made from pyrite and silver Marcasite jewellery is jewellery made from pyrite (fool s gold), not, as the name suggests, from marcasite.[1] Pyrite is similar to marcasite, but more stable and less brittle. Marcasite jewellery has… …
