Red agate identification method:
Agate is a gemstone commonly used in inlaid jewellery and engraving crafts. The method of authenticity selection is as follows:
(1) Color: The true agate color is bright and bright, and the color and light of the fake agate are both poor. The contrast between the two is more obvious. The natural red agate is well-defined in color and the strips are very visible. Careful observation reveals densely arranged small red spots at the red strips. The fake agate smokers made of stone imitation are mostly petal-shaped at the bottom, forming a "chrysanthemum bottom"; while the dyed blue agate is bright and uniform, giving a false feeling.
(2) Texture: The fake agate is mostly imitation of stone, which is softer than the true agate. The jade can be traced on the fake agate, but the real thing can not be drawn. On the surface, there are few flaws in the real agate, and there are more inferior qualities.
(3) Process quality: The production process of high quality high agate is strict and the red agate is advanced, so the surface brightness is good, the setting is firm, the circumference is positive, no scratches or cracks.
(4) Level: Water agate is the most precious variety in agate, characterized by a closed cavity in the agate containing water. All grades of agate are best in red, blue, purple and pink, and require transparency, no impurities, no sand, no cracks. Among them, those with a weight of 4.5 kg or more are special, and those with a weight of 1.5 kg or more are one. Grade, 0.5-1.5 kg is secondary.
When purchasing agate, it should be distinguished from its four parts: color, transparency, material and temperature:
Color: The color of true agate is bright, pure and harmonious; while the color and light of fake agate are poor.
Transparency: True agate transparency is not high, and some can see natural water lines or "clouds." The synthetic agate has good transparency and is as transparent as a glass ball.
Material: Fake agate is imitation with other stones, especially the material is soft and light. Usually, agate can be scratched on the glass. True agate jewelry is heavier than synthetic agate jewelry.
Temperature: True agate is warm in winter and cool in summer, while synthetic agate changes with the change of outside temperature. It is also hot in the hot weather, and it is cool in the cold. The most striking difference between natural agate and counterfeit products is whether there is a concentric layered structure in the cross section.
However, the whole piece of agate is easier to identify, and the cut finished product has no obvious neat pattern and is easy to admit. But in general, natural agate feels cool, the surface is coated with a layer of wax, and has a waxy luster; translucent; hardness is above Mohs grade 7, with a small knife; it is formed in a molten state Crystals, mostly spherical (such as rain stone), are particularly dense, and the surface is more delicate after grinding. It can be rubbed on the hard board for a dozen times. Generally, the agate is not hot, but the board is hot; the color is often a variety of colors. Mixed in a piece of agate, forming beautiful patterns, layers, brocade and other colorful patterns.
In addition to artificial synthesis, the fake agate is made up of beautiful high-quality stone. The basic characteristics are: the hand feels cool, but there is no waxy feeling and luster; the hardness is lower than Mohs 5, and the mark can be carved with a knife; the cross section is observed, except for the layer of the agate. It is thicker and even has cracks and opacity; the boundaries between the colors are clear; the specific gravity of different colors varies greatly, mainly due to the content of ingredients. In addition, some of the thin organic matter on the surface of the fake agate should be noticed as if it were a waxy luster. According to the owner of the agate product factory, there is no natural red agate, and the red agate is colored by firing. Red agate is white or gray. Therefore, the physiotherapy effect of red agate is not reliable. Please do not believe in the medical effects and health effects of ore.
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