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Natrolite, Neptunite
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| Mineral: | Natrolite: Na2[Al2Si3O10]·2(H2O) Neptunite: KNa2Li(Fe++,Mn)2Ti2Si8O24 | |||||
| Comments: | Jet-black square prisms of neptunite etched out of the enclosing white natrolite with minor benitoite. | |||||
| Location: | Benitoite Gem Mine. San Benito Co. California, USA. | |||||
| Scale: | 6.5 x 6 cm. | |||||
| Copyright: | © Fabre Minerals | |||||
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