In addition, black agate is also called black agate, which is mainly black to thick black and is often carved into sculptures or bracelets. Black agate is a widely used jade material since ancient times. In ancient times, people often used "pearl agate" to describe wealth.
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Distinguish the authenticity of black agate;
1. Transparency: The transparency of real agate is not as good as that of synthetic agate, which is a bit messy. Some can see natural waterlines or "clouds", while synthetic agate has good transparency and is as transparent as a glass ball.
2. Weight: Real agate jewelry is heavier than synthetic agate jewelry.
3, temperature: real agate is warm in winter and cool in summer, while artificial agate changes with the external temperature, when it is hot, it becomes hot, and when it is cold, it becomes cold.
The main component of black agate: The main component of black agate is Sio2 _ 2 (silicon dioxide), which is gray when it is very pure. If it contains various pigment ions, it will have red, black, blue, green and other colors, with a deep or shallow ring structure. These bands can have different colors (red, blue, purple, green, black, white, etc. ). If it is black and white, it is called black agate. Those with red and white stripes are called silk-wrapped black agates.
People's Network-Method of Distinguishing True and False Agate Jewelry
Baidu encyclopedia-black agate