2 thoughts on “Why do some Opal not change the color?”

  1. Editor: Zhu Mingrui
    I believes that everyone's love for Opal is mostly the unique charm brought by its color change effect. Indeed, who can resist the charm of changing lottery? Rotating Opal under the light source, her color is ever -changing. It is like a machel in a lush forest. As it wields the wings, the light and shadow complement each other. The color change adds the cake of Opal, but not all Opal has changed the color. Generally speaking, those with a variable color effect are called Guo Po, and Opal, who does not change the color, is called ordinary Opal. But is Opal, which does not change the color?
    This Opal's brooch
    In the definition of Chinese national standards "Jewelry and Jade Law" (GB/T 16553-2010), the body color is orange, orange-red, red Opal Essence Due to the color of the iron oxide, the appearance of the fire Opal is as gorgeous as flames. As early as the Maya period and Aztec, Huo Opal was regarded by the locals as a treasure. They called this gem that exudes warm and charming orange -red tones as "paradise -like gems".
    The fire Opal in the surrounding rock
    This Opal has no change effect, but they also belong to the gem -level Opal, mostly produced in Mexico. Mexico Qiwawa is famous for its colorless cherry red fire. Compared with most Opal, it is considered to be curved, and the fire -free fire Opal is generally carved as a face -to -face gem due to the high clarity and transparency. Because of its high value, such fire Opal is sought after and favored by major jewelry brands and designers. Tiffany's 2014 Blue Book Advanced Jewelry Series uses enthusiastic fire Opal to interpret fantasy and nature. The Chinese designer brand Frank Wu Design has also used Huo Ou as one of the main stones of the rose series to show a unique exotic atmosphere.
    The Blue Book Advanced Jewelry Series in 2014
    The value of Firefire Opal mainly depends on color, transparency, cutting and size. Colors are the most important influencing factor. The highest value on the market is bright orange -red. Different from most European Po, the fire -free fire Opal is transparent to transparent. The higher the transparency, the better the quality, and the fog's appearance will affect value.
    The face of Fire Opal Ring
    In major auctions, Huo Obo is also an important role that cannot be ignored. The earrings in the figure below are inlaid with two fires of the pillow pads and ellipse cutting, the total weight of 34.24 carats. The fire Opal shows a brighter orange -red color and is highly transparent. In December 2016, Sotheby's The winter auction was sold for $ 4,7500, about RMB 310,000.
    Is seeing here, are you tempted by the fire?
    fire Oud Crown

  2. There are many varieties of Opal, and there are four categories in total, namely Black Opal, White Opal, Fire Opal and Crystal Opal.
    (1) Black Obo: Black or dark blue, dark gray, dark green, brown varieties, the most ideal in black, because the black body color makes the color color effect more vivid.
    (2) White Opal: Opal, which changes color on white or light gray body, is transparent to translucent.

    (3) Fire Oudan: The translucent and transparent variety with no color or a small amount of color is generally orange, orange -red, red.
    (4) "Crystal" Obo: colorless transparent to semi -transparent Opal with a variable effect.
    The following factors should be considered when evaluating the value of Opal's original stone:
    1. Color: Generally speaking, Black Opal is more valuable than white Opal or light -colored Opal.
    2. Change: High -quality Opal's Response color is uniform and complete. The less the colorless part, the better. The color of the color changing color can appear colorful spots color according to blue, green, yellow, orange, and red value. The color of the color change is also a combination color. The richer the color, the better, the brighter the better.
    3. Clearness: Opal should not have obvious cracks and other miscellaneous bodies, otherwise its durability and aesthetics will be affected.
    4. Size: The larger the size of Opal, the better.
    Public account: I love Su Su

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