{"product_id":"agatized-seashell-specimen-ref-0338","title":"Agatized Seashell Specimen Ref:0338","description":"\u003cp\u003eA remarkable \u003cstrong\u003eAgatized Seashell specimen\u003c\/strong\u003e — an ancient marine shell that has been naturally replaced by agate over millions of years, preserving the original shell structure in stunning mineralised detail. The result is a fusion of fossil and gemstone, where the organic form of the shell is locked forever in colourful, banded silica.\u003c\/p\u003e\n\u003cp\u003eThis unique specimen (Ref: 0338) is a one-of-a-kind natural artefact, bridging the worlds of palaeontology and mineralogy. A conversation piece unlike any other.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine agatized seashell — natural fossil replacement\u003c\/li\u003e\n\u003cli\u003eOriginal shell structure preserved in agate\u003c\/li\u003e\n\u003cli\u003eUnique individual specimen — Ref: 0338\u003c\/li\u003e\n\u003cli\u003ePerfect for fossil collectors, mineral enthusiasts, and display\u003c\/li\u003e\n\u003cli\u003eAn extraordinary gift for nature lovers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAbout Agatized Seashells\u003c\/h2\u003e\n\u003cp\u003eAn agatized seashell is a fossil where the original organic shell material (calcium carbonate) has been replaced or filled with silica, such as chalcedony or agate, over millions of years. This permineralization process preserves the shell's outer shape and internal details while giving it a durable, glassy, and often translucent crystal structure.\u003c\/p\u003e\n\u003ch3\u003eHow Agatized Shells Form\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBurial:\u003c\/strong\u003e A marine or freshwater shell is rapidly buried under layers of sediment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMineral Percolation:\u003c\/strong\u003e Underground water rich in dissolved silica flows through the sediments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement:\u003c\/strong\u003e The silica slowly swaps out the calcium carbonate molecule by molecule, or fills internal cavities left by decaying soft tissue.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColoration:\u003c\/strong\u003e Trace minerals like iron, manganese, or other elements create diverse hues including brown, black, grey, red, and white.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFamous Examples and Localities\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTurritella Agate (Wyoming, USA):\u003c\/strong\u003e A well-known brown-and-cream matrix stone packed with small fossilised freshwater snail shells (\u003cem\u003eElimia tenera\u003c\/em\u003e) from the Eocene epoch (approx. 34–56 million years ago).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiralite \/ Indian Snail Fossils:\u003c\/strong\u003e Agatized left-hand coiled gastropod shells dating back 50 to 100 million years found in central India from the ancient Tethys Sea.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlorida Agatized Coral and Shells:\u003c\/strong\u003e Oligocene-Miocene specimens (20 to 34 million years old) where marine organisms turned into colourful agate geodes and crystal-lined fossils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUses and Collecting\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLapidary \u0026amp; Cutting:\u003c\/strong\u003e Because chalcedony has a Mohs hardness of 6.5–7, these fossils take a brilliant polish and are frequently sliced into slabs, tumbled into smooth pocket stones, or shaped into cabochons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetaphysical Properties:\u003c\/strong\u003e Within crystal and mineral communities, agatized fossils are valued as grounding and calming stones that link physical Earth history with spiritual energy.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e Ref:0338 (For my use only)\u003c\/p\u003e","brand":"KiwiRocks And Gems From Kiwi Country","offers":[{"title":"Default Title","offer_id":48730925433024,"sku":"0338","price":60.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0756\/6003\/4240\/files\/P_20260806_160046.jpg?v=1786099164","url":"https:\/\/www.kiwirocksandgems.com\/products\/agatized-seashell-specimen-ref-0338","provider":"KiwiRocks And Gems From Kiwi Country","version":"1.0","type":"link"}