Thank you for viewing! (^-^) Like a black diamond, Strongly shining terahertz☆ It has the effect of conditioning a tired body. Natural stone: Kyanite Bead size: Approximately 7mm Post: Catch: Surgical stainless steel We offer discounts for multiple purchases☆ This is handmade. I try to make them carefully, but they are not comparable to mass-produced items. I hope you will handle them gently. Since they are natural materials such as natural stones, There may be cracks or inclusions. I have several cats. Please refrain from purchasing if you are concerned. ・I am studying to polish natural minerals such as Larimar. My polishing skills are still developing, but thank you for your support(*´ー｀*) Please read my profile if you have a moment☆彡