Opal is different from other gems. It is neither opaque nor fire or exclusive. How to judge quality? Expert experience sums up the eight cheats, allowing you to easily select high quality opal.
Brightness determines everything: If you must use a sentence to explain the problem, it is "the more vivid the color of Opal, the better the quality." The low-grade opal looks bleak and radiant.
Presenting more than 3 colors: The highest-grade opal must be in multiple colors, that is, 3 or more colors.
Indispensable high saturation: Saturation is the purity of the color. When an opal gem presents a color that is very bright, it is another superior sign.
Judging from the graphics: This is the unique judging feature of Opal, and the different color patterns also determine the value of Opal. Because the color change of the opal surface is represented by irregular angular spots or color points, the regular shape of the angular large spots is the best, and the beautiful patterns are called colorful, ribbon, straw, Husks, flags, etc., and some irregular patterns will symbolize some wonderful things or like a painting. The superior pattern is very clear, including flower sea, rotation, lightning and flame. The poor pattern is blurry, with only a few small colored spots, like moss and grass.
The big head is always dominant: no matter which kind of gem is bought, the carat weight is a key factor affecting the price. The thickness in the entire opal is related to the size and shape of the opal itself, which is an important factor to consider and calculate when measuring value.
Multi-angle observation and more insurance: Since the value of opal is completely determined by color, the more uniform the color, the higher the value. Therefore, when purchasing opal, pay attention to observe the overall effect of gemstones, and observe the multi-angle observation. Parked in the whole body has a uniform brightness, saturation and color, there is no "blind zone".
Picking innocents: You don't want to see any gems, and all kinds of cockroaches will weaken the value of opal. Obvious cracks on the surface of Opal can seriously affect value. There are many fine cracks on the surface of the opal that will become worthless. Blisters or other mineral impurities are sometimes found under or inside colored opals. The color and pattern of high quality opal should be continuous and vary from angle to angle. When opal does not produce a changing surface, the color will only appear from one angle and will degrade the stone.
Must be a certificate: Since many opals in the market are flattened or mezzanine, in order not to spend money and future investment, buying a gem with a certificate has always been a thoughtful suggestion for everyone. It is an indispensable step for jewelers to present an authoritative gem identification certificate. This is not only to prove the need for value or resale of the insurance company, but also to clarify the responsibilities of both parties.
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