Neptunite

Lithium iron titanium silicate
Dallas Gem Mine, San Benito County, CA

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Metamorphic Rocks and Minerals

Neptunite is a striking black mineral composed of lithium, iron, and titanium silicate. It forms prismatic, glassy crystals and is often associated with natrolite in hydrothermal veins. The Dallas Gem Mine in San Benito County, California, is one of the few places in the world where neptunite occurs in well-formed, collectible specimens. Frequently found alongside the rare blue gemstone benitoite, neptunite adds both scientific and aesthetic value to this unique mineral locality.

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