"Huanglongyu" is a siliceous rock composed of yellow chalcedony (97%), a massive structure with a grain size of less than 0.004~0.060mm - cryptocrystalline structure; its hardness and refractive index and jade The marrow is the same, mainly bright yellow, yellow red, light yellow, light red, egg white and gray white, etc., its biggest feature is a strong grease luster.
The mineral composition of "Huanglongyu" is quartz, a small amount of calcite, a small amount of iron mud minerals (2% to 3%), montmorillonite, chlorite and the like. Among them, the cryptocrystalline chalcedony and a small amount of recrystallized quartz in the shape of his shape are composed of the siliceous component of "Huanglongyu".
The quality of the finished product of "Huanglongyu" is very unique, focusing on the fineness and luster of Hetian jade, the flexibility of Tianhuangyu, the color of Shoushan stone, and the feeling of cool and oily, which makes people never tired of it.
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