This is black obsidian. - Size: Inner diameter 15 cm, round beads 8mm+ - Color: Black - Material: Obsidian This item has been stored personally, so it is not brand new like a store-bought item. I hope that those who understand that this is a used item will purchase it. ※ Please note that as this is a natural stone, some stones may have small scratches, inclusions, or cracks. Please refrain from purchasing if you are concerned about minor details. Thank you for viewing.