The color is strong and positive, and the impurities are less. Blue, green and blood red are the best colors, but green amber is found in Dominica, Mexico and Fushun, China. Baltic green amber is mostly caused by chemicals at medium and high temperatures. Transparent blood amber is mostly caused by high temperature baking, and natural blood amber will have visible inclusions.
Usually, strong colors are usually accompanied by a small amount of visible impurities. It is said that tiny inclusions are the coloring factor of amber and also come from it. The most valuable variety is amber wrapped with insects, commonly known as "amber hidden bees", with clear insects, realistic shapes, excellent texture, large individuals and large numbers as the best.
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In ancient China, amber was once called Tiger Spirit, Breed, Animal Spirit, Dunmou, Zhu Jiang, Jade Heritage, etc. It is said that "the tiger spirit is dead and fossilized", or amber is the tears shed by the tiger. These legends contain the speculation and pursuit of amber by ancient Chinese people, suggesting that people think amber has the function of seeking good fortune and avoiding evil, calming the nerves.
In the eyes of ancient emperors, amber also had extraordinary significance. According to records, "The Temple of Heaven decorated the emperor's beads with lapis lazuli, amber, coral and turquoise."
Amber is an organic mixture formed by geological processes of coniferous resin from Mesozoic Cretaceous to Cenozoic Tertiary. The formation of amber generally has three stages. In the first stage, resin is secreted from cypress. In the second stage, the resin was deeply buried and petrified, and the composition, structure and characteristics of the resin changed obviously. The third stage is that the petrochemical resin is washed, transported, deposited and diagenetic, thus forming amber.