Despite being a natural stone, it has a gold color inside, giving the impression that the gold is enveloping the Shaitai jade. This pattern is called "Jin Bao Yu" (Gold-Wrapped Jade). It's a gorgeous fashion item. Size: Inner Diameter: 52.2mm Width: 10.7mm Length: 15.5mm Shaitai Jade, also known as Shetai Cui, is said to be the oldest natural stone in China. Origin: Inner Mongolia, China The main component of Shaitai Jade is silicon dioxide, SiO2 quartz rock jade. Its density is 2.659/cm3 and its hardness is 7, falling within the category of jadeite. It is often used for carving. Excavated since 2007, it has properties similar to jade, and was officially named "Shetai Jade (shē, tài, cuì)" after the local name "Shetai Town," with "Cui" (jade) added to the end. It shows more significant aging than jade, allowing you to enjoy a greater sense of luster and shine. Compared to jade, it has a richer color palette, is easier to bring out the luster, and is relatively more affordable. It contains a variety of trace elements and is said to balance the mind and body, and provide a calming effect. It becomes more lustrous with daily handling. ☆Photographed under indoor lighting, and no photo processing filters have been used. All accessories handled here are made by carving natural stones from raw stones. There is no dyeing, composite materials, heat treatment, or oil impregnation treatment. Due to being a natural stone, there may be fine scratches, abrasions, cloudiness, and minor cracks that occur over time. Please make your judgment based on the photos. These items were selected one by one by family members and obtained overseas. They are being offered for sale because they are not being used. There may be some errors due to amateur measurements. Please understand and purchase accordingly. Each item is one-of-a-kind, so refunds, returns, and exchanges are not possible. When shipping, it will be sent with a box, but the box is only for preventing breakage, and the box itself cannot be chosen. Please note that it is not a product box.