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Neptunite is an accessory black-coloured mineral confirmed as a distinct species in 1893 and found in association with aegirine. Neptunite is a silicate of sodium, potassium, lithium, iron, manganese and titanium.
Research Neptunite
 
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The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
©1993 - 2009 The Probert Encyclopaedia
Southampton, United Kingdom
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