Tokachi Stone Necklace - Set of 2. These were found while organizing a storage room. They appear to be remnants from when a relative was a jeweler, a long time ago. Tokachi Stone is a common name for obsidian found in Hokkaido, Japan. The ones with reddish-brown patterns (Kurenai Tokachi) are particularly famous. Because it is easy to sharpen, it was used as tools and weapons since the Stone Age. Even today, it is popular as a power stone, believed to have the power to foresee the future and ward off evil. Set of 2. There is no major damage, but please understand that these are pre-owned items due to being stored at home. Immediate purchase is welcome. Please feel free to ask any questions in the comments section.