"Roukan (琅玕) Jade" is a special term referring to the highest quality jade. This term, particularly cherished in China since ancient times, is also known as "Imperial Jadeite" in English-speaking countries. The main characteristics that make this jade the highest grade are the following three points: 1. Exceptionally Beautiful Color: It has a deep, vibrant emerald green color. Not only is the color intense, but it also possesses both brightness and depth, with a three-dimensional beauty that seems to well up from within. 2. High Transparency: Generally, jade is semi-transparent to opaque, but Roukan Jade has particularly high transparency, with a "icy" quality or something close to it. This creates a unique luster (terri). 3. Smooth Texture: The extremely fine crystal structure and the smooth, pleasant luster (tsuya) are also points of evaluation. Currently, among these, those with particularly high transparency, color, transparency, and few scratches are considered Roukan Jade and are traded at very high prices. "Product Details" Product Name: Roukan Jade PNC Size: 17.8 x 8.5 x 6.1mm (including bail) Metal: PT900 / PT850 (chain) Weight: PD;0.883ct / D:0.52ct 3.7g NC Length: 45cm (adjustable) Accessories: Appraisal report / Case Reference Price: ¥1,380,000-