Have you seen the starry blue universe in the space theater? The Milky Way in the blue night sky is dotted with golden shining stars. This is the typical appearance of lapis lazuli. The deep blue tone with a little purple is the most unique color of lapis lazuli.
In the distant ancient times, the status of lapis lazuli was very high. It and turquoise are the most valued opaque blue gems. It was not until the cutting industry developed in the 17th century that people’s interest turned to shiny transparent gemstones, and lapis lazuli seemed to be gradually forgotten by the world: with the reappearance of retro style in recent years, the mysterious color of lapis lazuli has been ignorant by consumers. , Once again active in the gem market.
The special purple-blue mixed with golden light spots or white spots are the appearance characteristics of lapis lazuli. It is a polymer of multiple minerals. The main mineral component is Lazurite (Lazurite) minerals mixed with pyrite Pyrite and Calcite. For minerals, the shining golden metallic spot is pyrite, while the white spots are mostly calcite, so lapis lazuli should be regarded as a kind of rock, which is different from most other gemstones which are single minerals. The refractive index is about 1.5, the specific gravity is 2.5-3, and the hardness is between 5 Dan 6. The texture is an opaque purple-blue gemstone. The lapis lazuli with higher calcite content has lower hardness and lighter color.
The best quality lapis lazuli is produced in Afghanistan, and other producing areas include the United States, Chili, Canada and Myanmar.
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