MITSUBISHI MATERIALS Precious Metal Clay SILVER PMC3 Contents: 7g / Silver weight 6.3g x 4 bags Total: 28g / Silver weight 25.2g Purchased new around 2010. I remember the new price at the time was about 12,000 yen for 4 bags. Unopened and new, but stored in a cool, dark place for over 10 years. This is a personal, long-term storage item, so it is considered junk.