Colored gemstones are called “the rainbow that falls into the mortal worldâ€. The natural large-grain gemstones are extremely rare and cannot be copied. Their rich colors are the occasional encounters and collisions between many elements in the vast nature. After a long period of time, they are formed. . The colorful treasures that gather thousands of Guanghua, gather endless vitality, each one represents the essence of nature.
Caibao grading standard
Vibrant yellow, clear and transparent blue, fresh and pleasant green, noble and elegant purple...Colored gemstones are rich in color, and colored gemstones of different colors are difficult to find due to different stone types and textures. Dilemma. Therefore, an authoritative color grading system has not yet been confirmed in the international lottery industry.
The mystery of the colorful grading
Color, lightness, and saturation are the three basic elements for color rating a colored gemstone. Color is the cornerstone of the color, brightness determines the brightness of the color, and saturation dominates the shade. When the three gather together, they form the color that the color treasure displays.
On the basis of basic colors red, orange, yellow, green, cyan, blue, and purple, the color of a gemstone is often a mixed color of several basic colors. According to the LCC color grading standards, the first thing to look directly at the visual point is to determine the most important color in the gemstone, and then find out the proportion of the secondary color and the secondary color to determine its true color.
Lightness, a mixture of color and light or darkness, results in a pale or very dark hue. From the colorless, very shallow to moderate, dark or even deep, black and other different degrees of differentiation, the different rating standards are slightly different.
Saturation is generally referred to as the intensity or vividness of the color. When the saturation is lowest, the color is completely neutral gray, and the highest saturation is pure spectral color.
Amethyst
The most common natural purple gemstone is amethyst. The natural amethyst produces a beautiful purple color due to minerals such as iron and manganese. Amethyst is widely distributed in nature, mainly in Brazil, Russia, South Africa, Madagascar and other places. In Tiffany's fine jewellery collection Blue Book2017, two delicate amethysts are set in the shape of a palm leaf shape, echoing the key words of this series "Jungleland".
sapphire
Sapphire is a generic term for corundum gemstones other than rubies in corundum gemstones, so sapphire can be pink, yellow, green, white, or even in the same stone. Blue sapphire is caused by a small amount of titanium (Ti) and iron (Fe) impurities. Sapphire has been found in many countries in Southeast Asia. The rarest of these is the sapphire in Kashmir, and Myanmar is the place where the finest sapphire is produced today.
ruby
Ruby is a corundum of red color. Most of the natural rubies come from Myanmar, Thailand, Sri Lanka, Xinjiang, China, and Yunnan, China. Natural rubies are very rare and therefore very precious. Among the red of ruby, the most valuable is the jewel with the strongest color, called "pigeon red". This kind of bright, intense color, which can be called deep red, reveals the true face of ruby. In the Bulgari Festa feasting jewellery collection, a platinum-studded ruby ​​and diamond ring is particularly dazzling. This ruby ​​comes from Mozambique, a large producing area of ​​ruby.
Manganese garnet
Manganese garnet is one of the important varieties of garnet gemstones. Its chemical composition is manganese aluminum silicate. The color ranges from red to orange red, red to brown red, rose red and light rose. Among them, orange red and orange yellow are used. Beauty, orange red manganese aluminum garnet is the best variety of red garnet. Tiffany's 2017Blue Book "Jungleland" high-end jewellery collection, surrounded by fern-bronze garnets, is like a delicate fruit.
Emerald
Emeralds rarely produce flawless gems. Most emeralds have cracks and inclusions, and the variety of cracks is complex, even called “garden†by researchers. In the Bulgari Festa feasting jewellery collection, emeralds are clustered in the center, like a fountain in an Italian garden; in the Earl Sunlight Journey collection, emeralds are once again used to depict sparkling The surface of the water.
Yellow diamond
True yellow diamonds account for only 0.1% of natural diamonds. The yellow diamonds of the usual color diamond grade, from low to high, are: Fancy Light Yellow, Fancy Yellow, Fancy Intense Yellow, Fancy Deep Yellow, Fancy Vivid. Yellow (Yellow color yellow). Although yellow diamonds are more common, yellow diamonds that reach the color level are rare. According to the statistics of the American Gem Society, less than 5% of the yellow diamonds identified by it are bright yellow diamonds.
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