This item is considered a "defective product" due to the stretching of the thread. There are minor scratches and signs of aging, but it appears to be usable. There are no hallmarks indicating precious metals. The material and specific type are unknown. *This item was received from my grandfather, and details are unknown.* Size: Total length approximately 45cm Weight: Approximately 14.9g *Measurements are approximate. Please allow for some error.* *The color may vary depending on your monitor environment. We try our best to accurately represent the color, but it is not perfect. Please understand this before purchasing.* *This is a used item, as judged from the images. We strive to describe the item honestly, but there is a possibility of oversight. Please inquire beforehand if you have any questions.* T13910 C #Crystal #Necklace #Accessories #Jewelry #Defective #PowerStone