Neptunite on Natrolite - California State Gem Mine, Santa Rita Peak, San Benito Co., California, USA More info: https://www.irocks.com/minerals/specimen/53682 Neptunite is a rare titanium-bearing silicate mineral that only forms as significant and superb crystals at the California State Gem Mine and only as insignificant crystals in a few other world localities. This California locality has given us large and superb, jet black crystals like on this gorgeous miniature. This handsome piece hosts s
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Neptunite on Natrolite - California State Gem Mine, Santa Rita Peak, San Benito Co., California, USA More info: https://www.irocks.com/minerals/specimen/53682 Neptunite is a rare titanium-bearing silicate mineral that only forms as significant and superb crystals at the California State Gem Mine and only as insignificant crystals in a few other world localities. This California locality has given us large and superb, jet black crystals like on this gorgeous miniature. This handsome piece hosts s
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