Thank you for viewing. This was attached to a K18 ring. One side has a hole. - Color: White - Hole: Yes - Shape: Spherical - Luster: Glossy Size: Approximately 10.7mm Please allow for some margin of error. Please refer to the photos for details. I hope you can use it for pendant heads, necklaces, rings, etc., for handmade items or custom jewelry. Since this is a layman's inspection, there may be oversights. Please purchase only if you are not concerned about minor details and can understand. As it is a natural item, there may be dullness, unevenness, dimples, wrinkles, etc. Please purchase only if you understand that this is a used item and has been stored at home. Please understand that there may be oversights. Those who seek perfection or are very sensitive should refrain from purchasing.