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re: Now Closed: I'll answer any question you have about ROCKS!

Posted on 7/10/14 at 3:35 pm to
Posted by Pectus
Internet
Member since Apr 2010
67302 posts
Posted on 7/10/14 at 3:35 pm to
quote:

Why is Feldspar always mixed with other stuff in a granite composition?

Why can't I find just plain FELDSPAR??

I especially like the pink kind -- and I may or may not be talking about rocks.



It can be just feldspar if you break off a piece from a huge feldspar crystal



The real reason is this:



Potassium feldspar is what makes granite all pink because it's the main mineral in granite.
Posted by DonChowder
Sonoma County
Member since Dec 2012
9249 posts
Posted on 7/10/14 at 3:37 pm to
Last question...I've got a big chunk of pegmatite on my desk. It has very distinct portions of quartz, mica and rosy granite. Where is the most likely place in the US that it came from?
Posted by crimsonsaint
Member since Nov 2009
37274 posts
Posted on 7/10/14 at 4:23 pm to
Do you know anything about Spectrus granite? Or is that just a "lame name"?
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