This answer is provided by "Mei Wei Jewelry", Mei Wei Jewelry, the feeling of love. Black tourmaline is one of 14 kinds of tourmaline, which belongs to tourmaline. Black tourmaline is also called "lucky crystal" because of its strong adsorption capacity, enhanced gas field and full of confidence. It is often used in solemn occasions abroad. In today's gem market, all kinds of gems are dazzling. How to identify the authenticity of black tourmaline is a problem that consumers often encounter. The following are some identification methods found by the author, hoping to help friends who want to buy black tourmaline. Appreciation: agate identification method 1 of black tourmaline: judge the quality by the gloss of black tourmaline. Black tourmaline with different glossiness has different prices. The brighter the black tourmaline, the higher its value. In addition, according to the knowledge of physics, we know that natural black tourmaline will adsorb fine dust after triboelectricity, thus darkening, while fake black tourmaline will not. From this point, we can judge whether the black tourmaline is true or false. Method 2 of identifying black tourmaline: Touch with hands or skin. Because black tourmaline has good thermal conductivity, it heats up quickly and cools down quickly. Therefore, if you hold the black tourmaline in your hand, if the temperature changes little before and after the black tourmaline, it may be fake. Method 3 for identifying black tourmaline: weight comparison method. Natural black tourmaline has a high density. Weigh the black tourmaline bracelet of the same specification in your hand. The natural black tourmaline bracelet is heavier than the artificial imitation. Method 4 of identifying black tourmaline: Observe the appearance of black tourmaline. The natural black tourmaline is crystal clear, and generally has growth texture inside, which is the most obvious difference from artificial products. When making black tourmaline, it is also cut according to its natural structure. A good trade union shows the brightness and fire color of the black tourmaline.