#carnelian — Public Fediverse posts

#Carnelian is a form of #chalcedony whose amber, brown, and even green hues are caused by inclusions of iron oxide and other #silicate #minerals.
Carnelian is another form of #silicondioxide besides quartz.

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#Crystal, #SiO2, #Mineralogy, #Geology, #Macro, #MacroPhotography, #Photograph