Fluorite spinel twin, 2 cm on 7 cm specimen. Composition plane horizontal. Naica,Chihuahua, Mexico. photo

Hajar | all galleries >> Palaeogalleries >> Published Specimens > Fluorite spinel twin, 2 cm on 7 cm specimen. Composition plane horizontal. Naica,Chihuahua, Mexico.

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25-MAY-2013

Fluorite spinel twin, 2 cm on 7 cm specimen. Composition plane horizontal. Naica,Chihuahua, Mexico.

Contrast this twin with horizontal composition plane between the two twin elements with the interpenetration of the twin elements in the previous image of a pseudohexagonal penetration twin.

Published (Figure 17) in The Mineralogical Record, volume 52, March-April 2021. Smith & Holtkamp, Twinning in Fluorite Crystals.

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