The composition of pearl contains some organic matter, and contains many kinds of trace elements and more than ten kinds of amino acids. Pearls have special functions such as calming the nerves, clearing the liver and improving eyesight, beautifying and regenerating muscles. Medicines, beverages and daily cosmetics made from pearls are deeply loved by people.
The color of the pearl is rich and colorful, consisting of body color and accompanying color. Such as white, 薄黄色, ピンク, ライトグリーン, 水色, グレー, ブロンズ, 紫と黒. According to the body color of pearls, it can be divided into white pearls, black pearls and colorful pearls. Under long-wave ultraviolet light, most natural pearls show light blue, 薄黄色, light green or light pink light, natural black pearls show light pink to light red fluorescence, while artificially dyed black pearls are often inert or light white fluorescence .
The quality and value of a pearl depend on its color, 光沢, 透明性, 形, そしてサイズ. The work of evaluating the quality of pearls should be carried out in bright natural light away from direct sunlight.
(1) 光沢. The surface of high-quality pearls should have a uniform strong pearl luster and rainbow-like halo. 一般的に言えば, the thicker the nacre, the stronger the luster, and the softer the surface, より良い.
(2) 色. Most Chinese people prefer white pearls, the whiter the color, the more precious it becomes. 薔薇, light rose and pink are also the most popular colors. Black pearls are also treasures among the pearls. Affected by the world’s fashion trends, some young people prefer black pearls. Because of their small output, they are particularly precious and expensive.
(3) 形. For pearls, the perfect circle is the best, followed by the near circle, and the pear-shaped, 長方形の, and semi-circular shapes are also popular. Some special-shaped beads, if the color and size are ideal, can also be inlaid with interesting accessories through design.
(4) サイズ. The size of a pearl determines its own value, so it is the most important factor in pearl evaluation. Pearls are generally larger and rarer and more expensive.
(5) 欠陥. Pearls often have flaws, and the fewer surface flaws, the better the quality. Usually the bad or redundant parts are removed by manual processing.
(6) Collocation. For pearl jewelry, in addition to the quality of each pearl, it is better to coordinate all the pearls, つまり, the overall similarity and harmony in appearance are better.