About 20 years ago, I purchased the pendant top new through mail order, and the necklace part was custom-made to match the top at a natural stone shop. The pendant top is removable, so it can be worn for both formal and casual occasions. The metal used in the necklace is surgical stainless steel. I only tried it on and have stored it in a cool, dark place at home for a long time. Although it is unused, please understand that it has been in the hands of a private individual, and only purchase if you are comfortable with this. I am also selling a pair of hematite earrings with a similar nuance. If you purchase them together, I will discount the shipping cost. Please feel free to comment if you are interested. - Stone Color: Gray系 (Gray-toned) - Materials: Natural hematite, surgical stainless steel - Design: Nuance design - Chain Length: Approximately 68cm total length (with adjuster) - Chain Stone Size: 4mm diameter - Scratches/Discoloration: None - Accessories: Storage pouch (jewelry drawstring bag)