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The American Catalin Corporation introduced 15 new colors in 1927 and developed techniques to create marbling. The colors included yellow, orange, red, greens, blue, and purple, with clear, opaque and marbled versions. In the 1930s, jewelry made in these colors was popular with sets of beads, bangles, earrings, and rings being worn together.
Gem-quality material is usually a strong yellow to honey brown, orange, red, or green; its very high RI (2.37) and dispersion (0.156) make for an extremely lustrous and fiery gem, and it is also isotropic. But here again, its low hardness (2.5–4) and perfect dodecahedral cleavage preclude sphalerite's wide use in jewelry.
Lab-grown diamonds of various colors grown by the high-pressure-and-temperature technique. A synthetic diamond or laboratory-grown diamond (LGD), also called a lab-grown diamond, [1] laboratory-created, man-made, artisan-created, artificial, synthetic, or cultured diamond, is a diamond that is produced in a controlled technological process (in contrast to naturally formed diamond, which is ...
Many gems are crystals which are classified by their crystal system such as cubic or trigonal or monoclinic. Another term used is habit, the form the gem is usually found in. [12] For example, diamonds, which have a cubic crystal system, are often found as octahedrons. [13] Gemstones are classified into different groups, species, and varieties.
The extreme hardness and high value of diamond means that gems are typically polished slowly, using painstaking traditional techniques and greater attention to detail than is the case with most other gemstones; [32] these tend to result in extremely flat, highly polished facets with exceptionally sharp facet edges. Diamonds also possess an ...
The trend of jewelry-making at home by hobbyists for personal enjoyment or for sale on sites like Etsy has resulted in the common practice of buying wholesale costume jewelry in bulk and using it for parts. There is a rise in demand for artificial or imitation jewelry by 85% due to the increase in gold prices, according to a 2011 report. [14]
The British crown jewels contain the Cullinan Diamond, part of the largest gem-quality rough diamond ever found (1905), at 3,106.75 carats (621.35 g). A diamond solitaire engagement ring Now popular in engagement rings , this usage dates back to the marriage of Maximilian I to Mary of Burgundy in 1477.
Golden Girl, Saphire, Rubee, Onyx and Jade are the Guardians of precious jewels called Gemstones. The Gemstones make the Guardians strong and skillful so they can defend the Kingdom of Argonia from all enemies. One of these enemies, Dragon Queen, seeks to conquer Argonia with her band of evil warriors Vultura, Moth Lady and Wild One.
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