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Rudist bivalves are an extinct marine mollusk that operated as major reef builders in the Late Cretaceous
Their origins date back over three billion years and were the dominant life form on Earth for more than two billion years
sharp tips
5–4 Mohs) than its polymorph
Haystack Quartz| Arkansas fossils Rudist bivalves are an extinctThis quartz cluster, sourced in Arkansas, features exceptional clarity, high silica purity and a brilliant, glassy shine. This is a 280 MYO specimen, has rainbow inclusions, and sharp multi directional points. This item is 6 x 4 and weighs 18. 05 oz
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