Pyrite Concretion Gallery
my doobles
mucuzi kyk
ophelia mardun
ellisonrtd3g
tapascomic
Pyrite concretion - Dongchuan Ore Field, Dongchuan District , Yunnan Province, China
libutron: Septarian nodules of Marl with PyriteSeptarian nodules are a type of concretion; they are
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