Zeolites are natural volcanic minerals that are mined in certain parts of the world. When volcanoes erupt, molten lava and thick ash pour out. Because many volcanoes are located on an island or near an ocean, this lava and ash often flows into the sea. Thanks to a chemical reaction between the ash from the volcano and the salt from the sea, amazing minerals like zeolites are formed in the hardened lava over the course of thousands of years.
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