News
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What Is Flower Agate? The Geology Behind Its Blossoming Plumes
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Flower agate seems to keep a pale garden beneath its surface. Learn what this modern trade name means and how silica, texture, and time create its blossoms.
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Why Does Prehnite Look Like Green Bubbles? The Geology of Botryoidal Crystals
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Prehnite often looks less like a crystal than a cluster of rain-softened green bubbles. Those rounded surfaces are a record of mineral-rich water, volcanic cavities, and thousands of tiny crystals growing together.
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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.
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Why Is Azurite Blue? The Copper Geology of Morenci, Arizona
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Azurite’s blue is not painted onto the stone. It is copper, water, carbon dioxide, and weathering gathering into a mineral the color of deep evening. -
Why Calcite Grows in So Many Shapes: Dogtooth, Cave Calcite & Crystal Habit
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Dogtooth points, blush cave clusters, glassy rhombohedrons: calcite seems to speak a hundred visual languages. Here is the geology behind its remarkable shapes.
