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The Empress of Uruguay is the world's largest amethyst geode, standing at a height of 3.27 meters. It is open along its length and weighs 2.5 tons in its current state. It was discovered in 2007 in the Artigas department, Uruguay by the Uruguayan mining company Le Stage Minerals.
An amethyst geode that formed when large crystals grew in open spaces inside the rock. The largest amethyst geode found as of 2007 was the Empress of Uruguay, found in Artigas, Uruguay in 2007. It stands at a height of 3.27 meters, lies open along its length, and weighs 2.5 tons. Amethyst is also found and mined in South Korea. [19]
Very large amethyst and regular quartz geodes 'Crystal cave' is both an informal term for any large crystal-lined geode and also used for specific geoheritage locations such as the Crystal Cave (Ohio), discovered in 1887 at the Heineman Winery on Put-In-Bay, Ohio, the Cave of the Crystals (Mexico), and the Pulpi Geode, discovered in 1999 in Spain.
A six-foot-tall purple amethyst geode from Brazil is the largest geode on display. [6] Another exhibit features more than two dozen pairs of colorful quartz and calcite geodes from Mexico. An unusual mineralology exhibit presents three dozen fluorescent minerals, such as fluorite, opal, willemite, calcite, ruby and sodalite.
The thunderegg, a nodule-like geological structure, similar to a geode, that is formed within a rhyolitic lava flow, were said by the Native Americans of Warm Springs to have been created by thunder spirits that lived in the craters of Mount Hood and Mount Jefferson. [83] [84]
The Patricia is one of the few large gem-quality emeralds that remains uncut. [11] Also on display was the 563 carat (113 g) Star of India , the largest, and most famous, star sapphire in the world. It was discovered over 300 years ago in Sri Lanka , [ citation needed ] most likely in the sands of ancient river beds from where sapphires ...
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