The difference between chalcedony and quartz
Chalcedony and common crystals are all compounds of silica. What is the relationship between them? The minerals of the quartz family are common rock-forming minerals on earth. These kinds of things are crystal, agate, jasper and opal. , silicified wood, etc., quartz is a silicate-like silicate mineral (Tectosilicates), the chemical composition is silicon dioxide (SiO2), may appear in a good crystalline form, but may also be tight tuberculous blocks, microcrystalline ( Quartzite) appears in the form of cryptocrystals (agate, jasper, etc.); when it is (relatively comparative) pure, it is a colorless crystal called crystal, but when it contains impurities without crystals, its color changes A lot, called chalcedony agate. Quartz, which is crystallized, is usually classified by color, such as: Crystal Quartz, Citrine, Amethyst, Milky Quartz, Rose Quartz, Sapphire Quartz, Smoky Quartz, etc. The above is a classification of crystalline quartz, which are all crystalline quartz. Although some are obvious, some are not so easy to see good crystals.
Another major type of quartz is microcrystalline or cryptocrystalline quartz, collectively known as agate, which is a non-directional homogenous body of crystal, which is formed as a microcrystalline precipitate of an aqueous solution, or an opal in a low temperature environment. Water product. Its color also has a lot of changes due to impurities, when it is colorless, it is transparent, otherwise it is translucent to opaque. When the color contains a strip-like change, it is called agate, and its opaque form is called jasper.
According to the above, we must have a preliminary understanding of the chalcedony and quartz family. Please remember that the classification method is: (1) if there is crystal (2) if there is crystal, it is crystal; (3) if there is crystal, There is water (4), there is water, it is agate, and it is roughly divided into: translucent, with few impurities; (4b) agate, translucent, slightly more impurities, with concentric strips; (4c) jasper, opaque The impurity multi-color lines are varied; (5) if there is water, it is opal.
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