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What are thundereggs? The rare, chalcedony-filled rocksT hundereggs look like regular rocks from the outside, but contain intricate and colorful mineral patterns inside — often made of quartz, chalcedony, or agate. They are nodule-like rocks ...
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Learn All About the Symbolism, Color and History of May's BirthstonesAgate is less rare than emeralds but no less ... "Each region typically produces agates with distinctive colors and patterns, contributing to the stone's global appeal." ...
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