Natural Stone Exquisite Peridot Ring Size (approx.): 8.5mm*11.8mm*4mm thick; Metal Material: Alloy Silver, with a pouch; Product Number: A3926; Ring Size: Adjustable free size. Free size rings are recommended for people who: ● Are unsure about their ring size, "I don't know my ring size clearly..." ● Experience swelling at night, making rings tight. Peridot, a natural gemstone, its host rock is the most major rock-forming mineral of the mantle, and is magnesium iron silicate. The crystals appear granular, exhibiting dispersed particles or granular aggregates within the rock. Peridot is one of the oldest gemstones found in nature and is also the most important green gemstone in history. As the birthstone for August, olivine protects "Leo" and symbolizes peace, good fortune, and wonderful wishes, bringing luck to the wearer. ■ The color of the photo may differ from the actual product due to the shooting environment. Instant purchase OK. Thank you!