Hobbies And Interests

Types of Lake Superior Agates

Agates are a crystalline variety of chalcedony, which is also related to quartz, characterized by bright colors and fine grain patterns. In Minnesota, agates appear different from any other variety in the world. In 1969, the Lake Superior agate was declared the state gemstone. A few different subtype classifications fall within the Lake Superior agate variety,
  1. All-Timer Agate

    • The all-timer agate is a part of the Lake Superior agate variety. This particular agate is considered a find for agate collectors. The all-timer agate is distinguished by being very large, weighing at least 2 pounds or more. The rock structure is considered a perfect agate shape and color.

    Water-Washed Agate

    • The water-washed agate is considered the most rare of the Lake Superior agates. This is generally found on the beach among pebbles and sand. The water-washed agate is very smooth and naturally polished from being pounded by waves. Colors vary from very bright red to dull orange.

    Eye Agate

    • The eye agate is another rare agate found in Lake Superior. This agate is characterized by the concentrically perfect round bands on its surface. The circular bands resemble eyes, and give this agate its name. These are generally found in shallow water or near the beach.

    Fortification Agate

    • The fortification agate is the most common of the Lake Superior agates. These stones reveal colorful banding patterns, ranging from deep blue to bright red and orange. The fortification agate can be found all over the Lake Superior region. This agate gets its name because its grain band patterns connect like the walls of a fort.


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