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while pyrite (FeS₂) crystallizes as golden flecks within the stone
Their origins date back over three billion years and were the dominant life form on Earth for more than two billion years
Garnets form in a range of geological environments and have been collected and used as gemstones for thousands of years
a family of silicate minerals with the chemical formula X₃Y₂(SiO₄)₃ that crystallize in the isometric system
Modern day stromatolites are rare
Golden Fern Fossil | Pennsylvania freeform while pyrite (FeS₂) crystallizes asThis striking fossilized fern comes from the historic Pottsville Formation, dating back to the Pennsylvanian Period (~300 MYO) when vast coal swamps covered much of ancient Earth. The frond impressions display a rare golden coloration, caused by natural mineralization that highlights the delicate structure of the plant. This item is 5 x 4 and weighs 6. 6 oz
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US$ 99.99
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US$ 19.19
