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Regular Calcite has a chemical formula of CaCO3
A geometric wonder this Pyrite cube in matrix comes from Navajun
Accented by tiny Quartz crystals
the underwater fissure was able to be excavated
Calcite can form in a variety of colors and shapes
Pyritized Ammonite Neutral / Earth Tone Regular Calcite has a chemicalA lovely and lustrous Ammonite fossil from the Ryazan region of western Russia. This Jurassic Period ammonite fossil has been replaced by the mineral Pyrite. Druzy crystals of Pyrite can even be seen inside the hollow growth chambers of the ammonite shell! Ammonites are an extinct variety of sea creatures that swam the shallow seas millions of years ago. As the shell fossilizes, it is naturally replaced by the mineral pyrite, creating shiny and golden
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