Concretion Gallery
karantel dynar
tomgrady
torontocomicon2019
bare hands
meanwhile-in-canada
•Conch “pearls” are calcareous concretions produced by the Queen conch mollusk, Str
•Conch “pearls” are calcareous concretions produced by the Queen conch mollusk, Str
Birds nest aragoniteAlso known as cave pearls, these usually spherical concretions form like natural
Looking at concretions on wikimedia commons again…
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