Occurring in nodular masses in rocks such as volcanic lavas. When split open, they reveal an amazing variety of colors, patterns and a distinct banding that is quite striking. Band colors are determined by the differing impurities present. Agate occurs in several distinct forms - fortification agate (has angular arranged bands), moss agate (is translucent, colorless, white or gray, with dark moss/tree like inclusions.
Feb 28, 2019
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