Gemology nowadays originated in the eighteenth century AD. Before that, humans in ancient times had known to decorate themselves with animal bones, shells, feathers, beautiful stones and other objects. With the development of history, different jewelry cultures have gradually developed. What can be called a gem? Simply put, all kinds of materials that can be worn, inlaid on jewelry or placed for viewing can be called gems. But in terms of the definition of gems, to become a gem must meet the following three conditions:
Pragtig:
Whether it is for decoration or ornamental use, pleasing to the eye is the first condition for gems. Dus, beauty is a prerequisite for a stone to become a gem, but it is not the only condition. To become a gem, you must have the following two items.
Rarity
The preciousness of gems lies in their rarity. Because they are scarce, they are valuable, and they can demonstrate the extraordinary value of gems. This is also the reason why stones everywhere cannot become gems.
Timeless
This condition is closely related to the stability and durability of the gem itself. The fixed degree means that the chemical composition of the gem itself must be very stable and not easy to change with time. Many mineral crystals in nature are so beautiful that they can’t stand the test of time because of the unstable chemical composition. Durability means that gems must have the two characteristics of withstanding wear and tear, which are related to the hardness and toughness of gems, because the main function of gems is to wear, and the materials that are easily damaged by rubbing or collision are also Can’t be a gem. There are thousands of minerals in nature, and there are only dozens of gems that are actually used for wearing decoration.
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