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Fine Jewelry University Articles matching: “Ruby and diamond flower ring”
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Fine Jewelry University
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Gem in the Spotlight: Iolite
… different colors when observed at different angles, especially with polarized light. Pleochroism is caused by differing absorption of light rays in doubly refractive crystals. Thus, no singly refractive gemstone can exhibit pleochroism. … than Emerald or Topaz. Because of this, some extra care should be taken with your iolite jewelry. Try to avoid wearing it in situations where it might be hit against hard objects to keep it free from cracks and small chips. Iolite is a …
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Gem in the Spotlight: Peridot
… Cleopatra. The ancients called it the “gem of the sun”. It was believed that peridot could chase away evil spirits and dissolve curses but only when set in gold. Peridot is the birthstone for August. It is also the accepted anniversary … a French word derived from the Arabic for green. Peridot’s color ranges from yellow-green to a warm olive green, and it is distinguished by its soft appearance. Color is the most important characteristic when determining the value of a …
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Measuring Gold Weight
… the same. Both are wrong. There is more trivia about gold weights. The troy system historically was used for measuring the weight of drugs, precious metals and gemstones. The name comes from the French city of Troyes. The noble metals (…. One ounce of gold is not the same as the ordinary ounce (really called avoirdupois ounce). The best way to understand this is to convert them both to a uniform system. A gram or gramme is a standard metric unit of mass. An avoirdupois …
