Size: Approximately 6.5cm in diameter (inner diameter 6.2cm) Natural Stone: Crystal raw stone Materials: Gold plating, copper Because they are natural stones, each one is unique. No comment is needed before purchase. Sizes are all measured flat, but as I am an amateur, there may be some errors. Please understand that natural stones will inevitably have some chips or imperfections. Due to being handmade, please be cautious when purchasing. I have many other items for sale. #NaturalStone #NaturalStoneAccessories #NaturalStoneBracelet #PowerStone #PowerStoneBracelet #Crystal #Amethyst #Quartz #LemonQuartz #Bangle