Serpierite

This serpierite formed in the oxidized zone of a copper-rich deposit, where calcium-, copper-, and sulfate-bearing waters crystallized into delicate blue fibrous coatings within fractures and cavities. The Lucky Lucy Mine, part of California’s historic Darwin mining area, is known for producing colorful secondary copper minerals.

Fragile and vividly blue, this specimen reflects the late-stage chemical processes that occur near the Earth’s surface, preserving a striking example of secondary mineral formation from the arid mining districts of eastern California.