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Huang Yuyu Introduction
Huang Yuyu, also known as Beijing Huangyu, is a type of jade that ranges from yellow to green in color. It originates from the Old Army Hall near the Ming Tombs in Beijing and is considered a form of serpentine jade. This particular variety is also produced in Xiuyan County, Liaoning Province, which is why it's sometimes referred to as Xiuyan Jade. Serpentine jade comes in a range of colors, with light green being the most common, though it can also appear in yellow, white, and brown tones. Its fine texture gives it a greasy or waxy luster, and it often has a translucent quality.
Saitama jade has been found in artifacts from the Hongshan and Liangzhu cultures, indicating its long history of use in Chinese craftsmanship. Due to its attractive color, relatively low hardness, and ease of carving, Saitama jade is often preferred for large-scale jade carvings and smaller decorative items. It is also commonly used to create various small ornaments, such as figures and animal-shaped crafts.

In China, there are several varieties of serpentine jade, including:
1. **Southern Saitama (Nan Yu)**: Also called "Xinyiyu," this variety comes from Xinyi in Guangdong. It features dark green to green hues with low transparency and a heavy waxy feel. It is typically used for lower-grade jade carvings, especially larger pieces.
2. **Qilian Jade**: Known also as "Jiuquan Jade," this jade has a dark green color with black spots and streaks. It is generally less transparent and considered lower quality.
3. **Kunlun Jade**: Sometimes referred to as "Kunlun Serpentine Jade," it closely resembles Liaoning jade but has poorer transparency. It is found in the foothills of the Kunlun Mountains in Xinjiang.
4. **Jinghuangyu**: Also known as "Jinghuangyuyu," this variety is yellowish to yellow in color and comes from the Old Military Church area of the Ming Tombs in Beijing.
5. **Minnan Jade**: Also called "Jinan Jade," it has a mix of black and green colors and is produced in Yinan County, Shandong.
These different types of serpentine jade reflect the rich diversity of jade resources in China and their historical significance in traditional art and culture.