Title: The Specific Classification Standards of Hetian Jade: An English Edition

Hetian jade, also known as white jade, is a type of high-quality jadeite mined primarily in China's Xinjiang Uygur Autonomous Region. It is widely recognized for its aesthetic appeal, cultural significance, and health benefits. The National Quality and Technical Supervision Bureau has established specific standards for Hetian jade, which includes its definition, classification, identification methods, and quality grades. This article will provide an English translation of these standards, shedding light on the specific classification criteria for Hetian jade.

I. Definition of Hetian Jade

According to the standards set by the National Quality and Technical Supervision Bureau, Hetian jade is a type of cryptocrystalline igneous rock composed mnly of calcite and dolomite minerals. It is characterized by its white color, soft and uniform texture, compactness, and plasticity. Hetian jade possesses a greasy-waxy luster and is generally semi-transparent.

II. Classification of Hetian Jade

Hetian jade can be classified into different grades based on its quality, with the highest grade being the特级 (Tèjí, or Superior Grade) and the lowest being the三级 (Sānjí, or Third Grade). In addition to these grades, there is also a category known as等外品 (Děng wài pǐn, or Off-Grade Products).

1. 特级 (Tèjí, Superior Grade)

The 特级 (Superior Grade) Hetian jade is the highest quality grade and is also known as the 白籽玉 (Báizǐyù, White Seed Jade). It is characterized by its pure white color, soft and uniform texture, compactness, and plasticity. This grade of Hetian jade is generally free from flaws such as cracks, impurities, and other defects. It possesses a greasy-waxy luster and is semi-transparent.

2. 一级 (Yījí, First Grade)

First-grade Hetian jade has a white or light-colored background with slightly brighter highlights. It is generally smooth and exhibits good transparency. This grade of Hetian jade may have minor flaws, such as small inclusions or minor surface imperfections, but these should not significantly impact its overall appearance or value.

3. 二级 (érjí, Second Grade)

Second-grade Hetian jade has a white or light-colored background with less brightness than first-grade jade. It may have some cloudiness or fine-grned texture, which can affect its transparency. This grade of Hetian jade may have more prominent flaws or inclusions compared to higher grades but should still be aesthetically pleasing and functional.

4. 三级 (Sānjí, Third Grade)

Third-grade Hetian jade typically has a darker background with less whiteness and transparency. It may have more significant flaws, such as larger inclusions or deeper cracks, which can impact its overall appearance and value. However, third-grade Hetian jade can still be used for various purposes, such as carvings or ornamental objects.

5. 等外品 (Děng wài pǐn, Off-Grade Products)

The 等外品 (Off-Grade Products) category includes Hetian jade that does not meet the standards of the higher grades. These products may have severe flaws, such as extensive cracks, heavy inclusions, or poor texture. While they may not be suitable for high-end applications, off-grade Hetian jade can still be utilized for lower-value products or crafting purposes.

In conclusion, the specific classification standards of Hetian jade, as set by the National Quality and Technical Supervision Bureau, are based on its color, texture, transparency, and overall appearance. By adhering to these standards, enthusiasts and professionals can accurately assess and appreciate the quality and value of Hetian jade.

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【责任编辑:生吉玉】