Klerksdorp sphere
Автор:
Jesse Russell,Ronald Cohn, ISBN:
978-5-5128-0263-2
High Quality Content by WIKIPEDIA articles! Klerksdorp spheres are small objects, often spherical to disc-shaped, that have been collected by miners and rockhounds from 3-billion-year-old pyrophyllite deposits mined by Wonderstone Ltd., near Ottosdal,...
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