This item uses natural stones. The string is made of elastic rubber. Plum Purple Tiger Eye approx. 8mm / Watermelon Jade approx. 8mm / Candy Jade approx. 8mm / Crystal approx. 8mm Inner diameter approx. 50mm 【Crystal】 Crystal has a clear and pure shine. It has been known as a "stone of purification" since ancient times, and is considered a versatile amulet, though simple in appearance. It goes well with any stone, and harmonizes the overall balance when combined. ◇ Due to the use of natural stones, there may be chips, scratches, and variations in color. We hope you enjoy these natural characteristics. ◇ Please refrain from purchasing if you are looking for the perfection of a mass-produced product, as this is a handmade item. ◇ There may be cases where the knots or ends of the string are not tucked away, or are left as part of the design. ◇ The color of the product may appear different from the actual item depending on your device and environment. Please check the profile for bulk purchases.