News
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What Is Epidote? The Geology Behind Its Forest-Green Crystals
Epidote can look like a miniature forest caught in quartz. Explore the chemistry, crystal structure, formation, color, and collector appeal of this richly green mineral.
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Is Grape Agate Really Agate? The Geology Inside Those Tiny Purple Spheres
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Grape agate looks as though a mineral garden learned to bear fruit. Those lavender spheres are real, but the familiar trade name hides a more complicated quartz story.
