The colorful light of Opal's magnificent is like a dream, and it is as beautiful as love. It is as quiet as a deep sea and a coral reef. Opal, regarded by the ancient Romans as the "Cupid Stone", is a muse of jewellery designers. The opal that blends with the Designer's ingenuity can always be dazzling. In China, compared to other jewels and jade, Opal's market share is very small, and many people only know their names are rare. The rumors about opal on the Internet are even more confusing. Today, Xiaobian says that the six rumors of Opal are true or false! Rumors 1: Opal has changed color wrong! Opal is famous for its color-changing effect, but it is not that Opal has a lottery, such as the most flaming fire opal in Opal. Fire Opal is an opal variety that is orange, orange-red, red, transparent to translucent, with no obvious color change or even no color change. The main origin is in Mexico, in addition to Guatemala, Honduras, and the United States. Brazil, and other places. Rumor 2: Strong light will make Opal eclipse Not exactly correct. The short glare does not fade the opal, and the opal effect of opal is produced by diffracting white light. But opal is a water-containing gem, the water content is reduced, and the stain will be lightened. The Opal stains produced in Australia are relatively stable, but the opal produced in Ethiopia is more delicate. The high temperature and strong light are easy to lose water, causing the spots to fade or even crack, so Opal needs to avoid long-term glare. Why does Opal have a color change effect? Opal is an aqueous mineral (2% to 10%) amorphous mineral aggregate composed of numerous SiO2 pellets. The SiO2 spherulites in the high quality opal are similar in size and orderly, otherwise they are ordinary opals without color change effect or inferior opals with no variable color effect. The color of Opal is produced by the diffraction of SiO2 pellets by diffraction to decompose white light. When the SiO2 pellets are relatively large, the voids will be relatively large, and red or orange diffracted rays will appear. If the SiO2 pellets are relatively small, the same voids will be smaller, and the blue-violet spectrum will be decomposed by diffraction. come out. Rumor 3: Gilson Opal is a synthetic opal Correct! Silicon opal made in the laboratory and having the same structure as natural opal is called synthetic opal. The method of synthesizing opal was first developed by Gilson in 1974, so it is no problem to synthesize Opal, but Gilson Opal is now more than just Gilson. There are more than one type of counterfeiting method in the market, and there are three types of similar methods in the market: (1) Optimized processed opal; (2) Synthetic opal; (3) Flattening opal. The treatment of opal is very simple, usually with saccharification and tobacco treatment. Both sugar processing and tobacco treatment are designed to deepen the background color of the opal and make the color change phenomenon more obvious. The opalization and saccharification of the opal can be observed under the microscope to see the black spots remaining in the carbonized sugar. The combined opal has two layers of opal and three layers of opal. The double-layer opal is the bottom of the black opal under the black, usually with black agate to set off the original white opal to make the game more excellent. A thin opal with a transparent crystal or glass, and a black bottom underneath, is a three-layer opal. If you see a clear and flat line on the side of the Opal, be wary of whether it is a mezzanine. The synthetic opal represented by Gilson Opal presents a very similar color change to natural opal, but it is not difficult to identify it. The synthetic opal has a mosaic in the form of a microscope, and the three-dimensional effect is obvious, the color spots are clearly defined, and the surface shows a lizard skin structure. Rumor 4: Opal can't be soaked in water Not exactly correct. Soaking water may change the water content of the opal, and the color depth of the stain will change, and the opal repeatedly repeating the watering and drying or blowing the water with a hair dryer can easily induce the opal crack. In general, Australia's opal water content is relatively stable, not afraid of soaking water. The filled opal will become turbid or gray due to blushing of the filling gel due to prolonged immersion. So how should Opal be maintained? Opal's hardness is equivalent to glass, so collisions should be avoided. Opal contains water, so if there is an extreme arid climate (such as desert) or rapid temperature changes (such as falling into boiling water), opal also has the risk of rupture. To clean the opal, you only need a soft rag to gently rub, do not let anyone use ultrasonic cleaning your opal. Rumor 5: Opal is the stone of doom Opal is the stone of doom is completely unwarranted. The power and disease of evil in medieval legends comes from colored stones. In the eleventh century, Pope Mahmoud of Rennes described Opal in this way: "It is the patron saint of the thief, and on the dark night it gives the thief a keen eye but blocks the eyes of others." This is to blame Opal's sinful spirituality for criminals to use it as a nuisance to thieves, spies, and robbers. Opal’s “crime†is also more deeply rooted in the hearts of diamond dealers. In the nineteenth to the early twentieth century, when diamond merchants realized that Opal would threaten the diamond business, they spread the rumor that “Opo is linked to bad luck†to protect their business. In fact, Opal has always been regarded as a stone of good luck in history. The earlier Greeks believed that Opal gave the power to forge ahead and predict the future; in the Arab legend, Opal was thought to be able to feel the lightning in the sky; the Romans believed that Opal would bring hope and purity. Rumor 6: Opal is not a precious gem The price of premium opal can be higher than diamonds. Black Opal is mostly produced in Leighton Nyinqi, New South Wales, Australia. It is the most precious opal. The usual market price is about 15,000 Australian dollars per carat (about 100,000 yuan). The artist Dubai uses poetic description to describe the beauty of Opal: "When the natural decoration of the flowers, the coloring of the rainbow, and the dyeing of the bird's feathers, she casts the paint from the palette. The opal stone is in it." The unpredictable opal should not be surrounded by rumors, stripped of layers of fog and indulged in the illusion of opal.
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