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the agate layer determines the majority of the geode’s color
As one continues to work with this unique mineral
almost black
and a valuable addition to any collection
unearthed only rarely and many years apart
Uruguay Amethyst Heart AM1285 Small the agate layer determines theLocality: Cataln Grande, Artigas Department, Uruguay Dimension: Weight: About 160 million years ago, when tectonic plates were rifting Africa and South America apart as the Atlantic Ocean opened, one of the worlds great flood basalt events was occurring. Basalts flowed from the rift, producing stratified lava flows thousands of feet thick in Brazil and nearby Uruguay. Within these flows, gas bubbles and lava tubes created cavities that were first
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