Turquoise is one of China's "four famous jade". Since the Neolithic Age, there have been many turquoise products in the relics of the past. Among the four famous jade in China, turquoise has the least reserves. In China, only about 3,000 square kilometers in the vicinity of Zhushan County, it is a world famous turquoise producing area. Turquoise City has become a business card for Zhushan's characteristic economy to the world.

Turquoise mineral resources in Zhushan County account for 70% of the country's total value of more than 300 billion yuan. In addition to the reputation of “China's high-altitude ecological green tea town”, “the hometown of son-in-law” and “the treasure house of Chinese herbal medicine in Central China”, “China's turquoise town” is famous.

Bamboo Mountain Turquoise Quality Technical Requirements (1) Mining and Processing. 1. Mining: Zhushan Turquoise occurs in the Cambrian carbon-bearing or mud-bearing siliceous slate, mainly developed in faults, inter-layer fracture zones, fissures, joints, folds and inter-layer extrusion zones, in the form of chicken nests. Output, pay attention to the vein direction during mining, prohibit the use of destructive mining methods such as blasting, and reasonably protect resources and personnel life safety. 2. Processing: The turquoise stone of Zhushan is produced in blocks, tuberculosis and spots. When peeling (using manual and mechanical grinding to remove carbon-silica surrounding rock), attention should be paid to the original stone structure to reduce processing loss. The process of peeling, cutting, grinding, drilling, etc. should avoid heat, and use clean water to prevent dust pollution. Polishing is strictly prohibited. Use a colored polish to avoid acid. (2) Quality characteristics. 1. Appearance characteristics: Zhushan Turquoise is a cryptocrystalline aggregate mineral. The color of the matrix is ​​very characteristic, mostly sky blue, azure blue, blue green, green, yellow green, etc. The associated mineral color is mostly black, white and green. , yellow, etc. 2. Physical and chemical indicators: (1) Chemical composition: hydrous copper aluminophosphate, the chemical formula is CuAl6(PO4)4(OH)8 ·5H2O. (2) Refractive index: 1.61 to 1.65, and the spot method is usually 1.61. (3) Gloss: Glass gloss to waxy luster. (4) Mohs hardness: 3.5 to 6.0. (5) Density: 2.76 g/cm3 (+0.14, -0.46). (6) Ultraviolet fluorescence: no weak under long wave, greenish yellow; no under shortwave. (7) Absorption spectrum: Occasionally, 420 nm, 432 nm, 460 nm medium to weak absorption band. (8) Infrared spectrum: There are characteristic absorption peaks such as 3510 cm-1, 3465 cm-1, 3292 cm-1, and 3080 cm-1. 3. Quality grade: Project grade first grade second grade third grade color pure sky blue or azure, no variegated blue green, green, variegated light blue, yellow green, etc., variegated more glossy glass Glossy waxy to greasey Glossy Wax Gloss Transparency Microtransparent to transparent opaque opaque texture dense, finer and denser, more delicate and looser 4. Safety requirements: Product safety indicators must meet the relevant regulations of the state for similar products.

Apply to：
Producers within the protection scope of Zhushan Turquoise Geographical Indication Products may apply to the Quality and Technical Supervision Bureau of Zhushan County, Hubei Province for the use of “Special Marks for Geographical Indication Products”, which shall be reviewed by the Hubei Provincial Bureau of Quality and Technical Supervision and announced by the General Administration of Quality Supervision, Inspection and Quarantine. Approved. The legal inspection agency for Zhushan Turquoise is designated by the Hubei Provincial Bureau of Quality and Technical Supervision.