enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Gemstone irradiation - Wikipedia

   en.wikipedia.org/wiki/Gemstone_irradiation

   Gemstone irradiation is a process in which a gemstone is exposed to artificial radiation in order to enhance its optical properties.High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice, which in turn alters the optical properties within it. [1]

3. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or polished, is used to make jewelry or other adornments.

4. Cardinal gem - Wikipedia

   en.wikipedia.org/wiki/Cardinal_gem

   The five cardinal gems. Clockwise from top: sapphire, ruby, emerald, amethyst, diamond. Cardinal gems are gemstones which have traditionally been considered precious above all others.

5. Jewellery - Wikipedia

   en.wikipedia.org/wiki/Jewellery

   In Assyria, men and women both wore extensive amounts of jewellery, including amulets, ankle bracelets, heavy multi-strand necklaces, and cylinder seals. [ 39 ] Jewellery in Mesopotamia tended to be manufactured from thin metal leaf and was set with large numbers of brightly coloured stones (chiefly agate, lapis, carnelian, and jasper).

6. Colored gold - Wikipedia

   en.wikipedia.org/wiki/Colored_gold

   Cobalt-containing alloys, e.g. 75% gold with 25% cobalt, form a black oxide layer with heat treatment at 700–950 °C. Copper, iron and titanium can be also used for such effect. Gold-cobalt-chromium alloy (75% gold, 15% cobalt, 10% chromium) yields a surface oxide that is olive-tinted because of the chromium(III) oxide content, is about five ...

7. Navaratna - Wikipedia

   en.wikipedia.org/wiki/Navaratna

   Thailand's "Queen Sirikit Navaratna" necklace.. Navaratna (Sanskrit: नवरत्न) is a Sanskrit compound word meaning "nine gems" or "ratnas".Jewellery created in this style has important cultural significance in many southern, and south-eastern Asian cultures as a symbol of wealth, and status, and is claimed to yield talismanic benefits towards health and well-being.