DescriptionPotassium feldspar 13.jpg English: A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical...
DescriptionPotassium feldspar 10.jpg English: A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical...
DescriptionPotassium feldspar 3.jpg English: A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical...
St. John URL: https://www.flickr.com/people/47445767@N05 publication date: 13 January 2017 described at URL: https://www.flickr.com/photos/jsjgeology/32139286972/...
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