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Ficheiro:Corundum (Pennsylvania, USA) 2.jpg

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Ficheiro:Corundum (Pennsylvania, USA) 1.jpg

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Ficheiro:Anyolite (corundum-amphibole zoisitite) (Neoproterozoic; Mundarara Mine, about 27 km west of Longido, Tanzania) 7 (49143533783).jpg

com/photos/jsjgeology/49143533783/ operator: Flickr URL: https://live.staticflickr.com/65535/49143533783_29d0179e2b_o.jpg determination method or standard: SHA-1...


Ficheiro:Sim popular-mechanics 1910-06 13 6.pdf

Sim popular-mechanics 1910-06 13 6 (page 26 crop).jpg...


Ficheiro:Anyolite (corundum-amphibole zoisitite) (Neoproterozoic; Mundarara Mine, about 27 km west of Longido, Tanzania) 8 (49144234192).jpg

This file is licensed under the Creative Commons Attribution 2.0 Generic license. You are free: to share – to copy, distribute and transmit the work to...