The division of the crystal type in the market is often carried out according to the color difference, and is divided into golden hair crystal, yellow hair crystal, brown (red) color hair crystal, black hair crystal, green hair crystal, silver hair crystal and the like. However, the division of the crystal type according to the color often brings some one-sidedness, and it is impossible to distinguish the crystallizing essence. For example, the green hair crystal may be caused by the hair of the tourmaline, or may be caused by the hair of the anode stone. Therefore, the division of the crystal type, the most important should be divided according to the different hair-like inclusion minerals. Common ones are: rutile crystal, tourmaline crystal, cation stone, and limonite crystal.
Rutile hair crystal:
Hair is rutile, often in bundles, radial distribution, and has a variety of colors, usually golden yellow, light yellow white, brown red, etc., transparent ~ translucent, diamond luster, very bright under the light; due to the refractive index of rutile It is high and is tetragonal. It can display multicolored color according to the hair under the microscope. The cross section of the hair is nearly square, which is different from other crystals.
Tourmaline hair crystal:
It is the most common variety on the market. The hair is tourmaline, black and green, common in black, shape resembles hair, opaque ~ translucent, glass luster, and the cross-section is characterized by a curved triangle.
Yangqi Stone Crystal:
The hair is green to dark green, transparent, and glassy; under the microscope, the hair is flat and long and is different from the tourmaline.
Limonite crystal:
The hair is red to brownish red. The hair is not a primary hair crystal, but a secondary illusion crystal formed by the epigenetic oxidation of the original amphibolite crystal. The limonite often retains the original radiant hair. Crystal form, or filtered by weathering and leaching, forming an empty tube; due to the large difference in refractive index between the empty tube and the crystal, the light shining on the wall of the empty tube is reflected, showing metallic luster, which is very dazzling and often mistaken for The goethite crystallizes.
In addition, in the process of oxidizing the limonite into a limonite, the original erectile hair filaments will form feather-like expansion cracks on both sides of the hair due to volume expansion, and the characteristics are very typical.
Crystal brothers
Crystal is a colorless transparent quartz crystal mineral. Its main chemistry is silica. When the silica crystal is perfect, it is crystal; while the silica gel is dehydrated, it is agate; the silica hydrogel is solidified and becomes opal; when the silica grain is less than a few microns, it is composed of chalcedony, vermiculite, and Quartzite and so on.
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