Middle and high grade. According to the information of Sujin Jewelry, Sujin is a product produced by Sujin Jewelry Design Office in Liwan District, Guangzhou. Sujin Jewelry Design Office is mainly engaged in jewelry design creativity, jewelry computer-aided design, jewelry production and technology, precious metal jewelry design and creativity, etc. The product materials of Sujin Jewelry include natural pearls, natural gemstones and other high-quality materials. The craftsmanship pays attention to hand-made and detailed treatment, and there are also many unique styles in design. Generally speaking, Sujin jewelry should belong to middle and high grade.