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While externally similar shapes, these two minerals are very different inside.
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Leptynite

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An obsolete term, initially applied to a fine-granied granulite-facies rock, predominantly consisting of alkali-feldspar, containing minor quartz, white mica, garnet and tourmaline, and with a planar gneissose structure. Later used for any white-coloured quartzofeldspathic rock, typically forming bands alternating with metabasic rock, irrespective of the intensity of metamorphism.
Compare also leptite.


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Unique IdentifiersHide

Mindat ID:
50061
Long-form identifier:
mindat:1:1:50061:2

Internet Links for LeptyniteHide

References for LeptyniteHide

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