File:Amazon Gold Granite (graphic granite) (Brazil) 5 (34839507732).jpg

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Amazon Gold Granite - a graphic granite attributed to Brazil with creamy-colored potassium feldspar, gray quartz, and a mafic mineral (probably biotite mica).

Granites having a graphic texture (runic texture) consist of potassium feldspar and quartz crystals that interpenetrate in a way that somewhat resembles ancient writing, like Cuneiform or sometimes Arabic. Such rocks are graphic granites (a.k.a. runic granites; runites). Graphic granite is a not-uncommon component of pegmatites.

Some decorative stones are pegmatitic granites, and large slabs of such rock often have areas of graphic granite. The variety shown here is not necessarily entirely graphic granite.
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Source Amazon Gold Granite (graphic granite) (Brazil) 5
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/34839507732 (archive). It was reviewed on 9 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

9 October 2019

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Date/TimeThumbnailDimensionsUserComment
current05:31, 9 October 2019Thumbnail for version as of 05:31, 9 October 20197,536 × 5,152 (10.56 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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