Fluorite
Fluorite is a colorful mineral (calcium fluoride) commonly collected as crystals or specimens in various hues like purple, green, and blue, valued for its cubic crystals and fluorescence.
Estimated value as of 2026 · Source: Typical price for common polished fluorite pieces or small specimens from retail…
Fun Fact
Fluorite is the only common mineral with perfect cleavage in four directions, making it prone to breaking into perfect octahedrons.
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