Approximate size of the natural stone peridot ring: Diameter 10mm * Thickness 7mm; Metal material: Alloy s925 silver, with s925 stamp *The peridot part can rotate.* Meaning of rotation: Luck turns for the better, fortune opens. Product number A4912, with a bag. Ring size: Adjustable free size. Free size rings are recommended for people who: ● Are unsure about choosing a ring size, "I don't know my ring size clearly..." ● Rings become tight due to swelling at night. Peridot, a natural gemstone, its parent rock is the most important rock-forming mineral of the mantle, and is magnesium iron silicate. The crystals appear granular, and exhibit dispersed particles or granular aggregates in the rock. Peridot is one of the oldest gemstones existing in nature and is also the most important green gemstone in history. As the birthstone of August, olivine protects "Leo" and symbolizes peace, good luck, and wonderful wishes such as bringing good fortune to the wearer. ■The color of the photo may differ from the actual product depending on the shooting environment. Instant purchase OK. Thank you!