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California state gem mine, Santa Rita peak, San Benito, Californie, USA
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Benitoite and Neptunite, California State Gem Mine, Santa Rita Peak, San Benito, California, USA. On a white natrolite matrix measuring 7 x 4.5 x 1.5 cm, several blue crystals of benitoite, a titanium and barium silicate, type locality, and black crystals of neptunite, a titanium, lithium, sodium, potassium and iron silicate. Handwritten label and cardboard tray, Chadel collection