I purchased this item here. The previous seller mentioned they bought it at IENA. The color and cut are beautiful, and I loved it very much, but I rarely used it because I didn't want to waste it. It would look lovely with a silver chain, but I think it would also look cool strung on a leather cord. (The retail price seems to be around 9900 yen) 【mounir / Mounir (from IENA's website)】 Since its establishment in 1989, the design philosophy has always been to create sincere and beautiful works that are not influenced by temporary trends. They abundantly use precious and semi-precious stones, and all of these materials are sourced from fair trade and legal suppliers. Also, skilled artisans in the London studio handcraft the pieces, maintaining the brand's ethical values. - Brand: mounir / Mounir - Color: Blue - Material: Stone, Silver - Design: Faceted cut Thank you very much.