Excellent lustrous black prismatic crystals of Neptunite measuring to 1.8 cm long pleasingly contrast against the white Natrolite matrix. Rare scattered micro-crystals of brown Joaquinite-(Ce) are seen emerging from the Natrolite. In addition, very rare micro-bladed crystal groups of possible Orthojoaquinite-(Ce) occur in the Natrolite. A fine specimen from the California State Gem mine in San Benito County, California, USA.
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