Natural Montana Agate Gemstone Montana agate is usually banded in layers or stripes. Some varieties have specks of color, while others may have fossilized inclusions.
Most Montana agates are found in gravel deposits from the Pleistocene age in the area of the Yellowstone River and its tributaries. Called the earth rainbow, the concentric bands of Agate form in nearly every color the earth can produce, including a colorless form.
Montana Agate is believed by some to help you balance emotions and is a powerful emotional healer.