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 Post subject: Not so common Cumberland habit quartz crystals Di-pyramidial
PostPosted: Wed Mar 09, 2016 9:34 pm 
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Joined: Tue Jun 03, 2008 4:40 pm
Posts: 2667
Location: South Dakota
Hit into some unique quartz crystals from our machine dig last Spring in Virginia.
Looking like Beta quartz crystals, with their di-pyramidial habits, and lack of(or very thin) m-faces, they could very well be the rare "psuedo alpha after beta" crystals, that only occur sporadically in odd volcanic quartz deposits(rhyolite). Sadly, this was not to be the case.(as dollar signs floated away....)
Now we just call them "Cumberland habit".....still a fairly rare quartz crystal shape. I can't recall ever digging, or handling, any quartz specimens from the South that showed this cool shape.
Attachment:
cumberland.jpg
cumberland.jpg [ 4.27 KiB | Viewed 1148 times ]


Most of the specimens were very small
Attachment:
File comment: The crystals are match head size
A250 - 20160229_230950.jpg
A250 - 20160229_230950.jpg [ 33.92 KiB | Viewed 1148 times ]


Dime sized single point quartz crystal with nicely formed "cumberland habit"
Attachment:
A444 - 20160229_235751.jpg
A444 - 20160229_235751.jpg [ 27.85 KiB | Viewed 1148 times ]

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