Lapis lazuli (English: Lapis lazuli, from Latin) is known in ancient China as Li Lin, Jin Jing, Yu Yu, and Qing Yin. Buddhism is known as Nu Nuo or Liuli, and it is one of the witnesses of ancient and eastern cultural exchanges. According to statistics, lapis lazuli was introduced to China from Afghanistan through the "Silk Road." It is usually an aggregate production with a dense, granular, granular structure. The color is dark blue, violet blue, sky blue, green blue and so on. Lapis lazuli is also the main raw material for natural blue pigments.
The choice of lapis lazuli is uniform with no cracks. The fine texture is free of Venus, followed by white sprinkled gold. Sprinkling gold means that Venus is evenly distributed. If the content of pyrite is low, Venus will not appear on the surface and will not affect the quality. However, if Venus is dark, dark, or has too much calcite to form a large area of white spots on the surface, the value is greatly reduced.
Gold stone is a glass to oil gloss, its hardness is 5.5. Lapis lazuli has unique blue, dark blue, light blue and light cyan, etc. According to their different colors and can be divided into: dark gold and jujube dark blue and thick and not black; Jin Gelang jujube dark blue and pyrite content More than lapis lazuli minerals; birthstone pale blue and white calcite