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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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. -
Why Do Some Crystals Glow? A Beginner’s Guide to Fluorescent Minerals
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In daylight, a mineral waits. Under ultraviolet light, hidden color wakes inside it. Here is the science behind fluorescent minerals and how to view them safely.
