Silicates[88 from 152] Neptunite Large prismatic black neptunita crystals in natrolite.
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The name, a brief visual description:
Neptunite
Large prismatic black neptunita crystals in natrolite.
Sample size:
Ore. 6,5х5х2,5 cm., 0,076 kg.
Place of sampling:
San Benito, California, United States