Product Details

Own a piece of the iron rich earth of Northern Minnesota with this stunning 4-inch Binghamite slab. Also known as "Minnesota Silkstone," this material is a rare collectors gem that can be used to make stunning jewelry. Binghamite is a rare form of agate, often compared to Tiger's Eye and Pietersite, and is found exclusively in the Cuyuna Iron Range of Minnesota. While it is occasionally thought that Binghamite, Silkstone, and Minnesota Tiger's Eye are different minerals, they are actually three distinct patterns of these specimens, and often occur on the same rock. Whether you are looking for a unique display piece or lapidary material to cut high-end cabochons, this slab offers exceptional pattern density and a solid structure. Because the original mines have been closed for years and state laws prevent the removal of rocks from the area, authentic Binghamite is becoming increasingly difficult to source.