After scientific analysis and verification introduced crystal, we look at the classification of crystal, crystal classification is varied, it can usually be divided into three categories:
Crystalline
Usually we see a cluster of crystals formed by a number of hexagonal crystal columns (hexagonal crystal), which are crystals, such as white crystal, amethyst, citrine, powder crystal, crystal, tiger eye, etc. All belong to this category.
Cryptocrystalline
The appearance of cryptocrystalline crystals is a block, not a hexagonal crystal cluster, but they are also hexagonal. However, we can't observe their hexagonal crystals with the naked eye, because the volume of crystals is extremely small, and it is necessary to use a microscope to see the hexagonal open crystal. And this type of crystal is very smooth, because there is a "hydrated silica " between the crystals, and agate belongs to this category.
Special class
These crystals and general crystals are very large, and it is difficult to classify them as crystals or cryptocrystals. Therefore, they are classified as special types, such as Skeeton Crystal, which is crystallized, and Phantom Crystal, which is a landscape image in the crystal. Phantom Crystal) and so on are summarized as such.
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