In abandoned silver mine in Pulpí, in Spain’s south-eastern Almería Province, lies a treasure that’s not made from any precious metal at all. Instead, what’s hidden here is the world’s largest geode – a natural crystal phenomenon that has stunned scientists.
As Mila Carretero, geologist and coordinator of the Pulpí Geode, explained, a geode is a cavity inside a rock that is covered with crystals. Sitting against a backdrop of oversized crystal spars, she broke open a tiny rock with tiny gems inside, to show a comparison. “It’s the same as the one I have behind me, only this one is a super-sized version,” she said with a laugh as she pointed over her shoulder.
The Pulpí Geode is eight metres wide, two metres high and two metres deep. “When it comes to a geode, by definition, this is the biggest ever discovery,” she noted, adding that Pulpí is not to be confused with another crystal marvel, the Naica Mine in Mexico, which has larger spars (15m long compared to Pulpí’s two metres), but which is a cave lined with crystals rather than a geode.
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