Drip method: Huang Yushi is lipophilic and delicate. If a drop of water is dropped on the Huang Yushi, it will appear as a lotus leaf and dew for a long time, while the fake one does not have this characteristic, and the drop will dissipate soon.
Visual inspection: Topaz has vertical stripes on its surface, while crystal or fake jade has horizontal stripes. The color of topaz is easily confused with topaz, but the luster of the two is actually different. Topaz gemstones have a very soft waxy luster, while the luster of crystals is cold and transparent.
Touch: Topaz ratio is above 3.5. If measured by hand, it will have a pressure sense, which is heavier and the false touch is lighter. These two feelings are also different. The real topaz feels very delicate and the fake one is very rough.
Three-level Classification of Topaz in Hetian Jade
First-class topaz: Of course, it is also the best one. This topaz is fine in texture, uniform in color, bright in color and translucent. Jade is almost flawless and perfect. It has high collection value, investment value and ornamental value. It is difficult to see this kind of jade in the market.
Second-grade topaz: Compared with the first-grade topaz, there will be more flaws, some cracks and impurities, but the texture is still very good, with oily or waxy luster, and the color is evenly distributed from light yellow to dark yellow.
Third-grade topaz: Compared with the first two topaz, this topaz is quite different in impurities and jade quality. This kind of topaz has a high probability of defects, mostly light yellow, and the color uniformity is also poor.