Lake Superior Agate Earrings 9x7mm 3537
9x7mm Agate earrings in a Sterling Silver 4-prong setting.
Lake Superior Agate. Agates are a variety of the mineral quartz, SiO2, with a hardness of 7. The combination of quartz with small amounts of different elements has created beautiful banding, varied patterns, and eye-catching colors unique to each agate. These gemstones can be found on many Lake Superior beaches throughout the states of Michigan, Wisconsin, and Minnesota.