7.5mm Sunstone(Venus feldspar)
The scientific name of the sun stone is "sunstone" or "Venus feldspar", a type of plagioclase. It is named because there are many neatly arranged and brightly colored flake mineral inclusions in the feldspar when illuminated by the light, reflecting the golden bright spots, like the sun's rays, and it is the product of the sun worship of various peoples in the world. Visitors Zhaoyu flashlight learned that sunstone is a kind of plagioclase, because the crystal contains hematite, goethite and ot