This was a gift, but it was too tight for my wrist, so I've kept it stored away. I usually wear a watch with a 17.5 cm wrist circumference. The elastic band will stretch, but I think it's best for those with a wrist size less than 17.5 cm. The product name is the result of a Google Lens search. In the unlikely event that the product name differs from the actual stone name, the actual item takes precedence. Please be aware of this. I will list the item after searching multiple times in environments where the lighting changes in the morning, afternoon, and evening, and confirming that the names match. The stone has some dents, and there are many gold threads? inside the stone. I remember being told when I received it that it would be effective for improving financial luck. This is a rather old product. It seems that the elastic band can be replaced, as I saw online, so those who are concerned can replace it. Please purchase this item only if you understand and agree with the above explanation. Please note that I cannot provide professional explanations like a specialist. Stone size: 12-3mm