A rare specimen of crystallized quartz weighing 1,750 kilos is on display in the Naturalis hall "the Earth".
(Source: Naturalis )
Naturalis has unveiled a breathtaking giant cluster of rock crystal, a truly extraordinary specimen that can be admired starting Saturday, May 27, 2023, in the "Earth" gallery. This gigantic crystal, measuring 2 by 1 by 1.5 meters and weighing an impressive 1,750 kilograms, is a rarity. Quartz's ability to crystallize is limited, as it is usually trapped between other minerals. Forming pure, gemstone-quality quartz crystals is an extremely rare phenomenon. The crystal in Naturalis is the result of a unique and rare event. Hanco Zwaan, a gemstone expert at Naturalis, emphasizes that the chance of ever discovering a cluster of comparable size is virtually zero. Visitors will have a unique opportunity to admire this giant cluster up close.
Formed and discovered under unique circumstances
The impressive crystal is estimated to have formed around 270 million years ago beneath Mount Ida in the US state of Arkansas. This formation occurred under extraordinary conditions. Thick layers of sand and clay were transformed into sandstone and shale in a fault zone. Approximately 280 million years ago, these rocks were pushed up to form the present-day mountain range, creating numerous cracks in the rock layers. These cracks served as channels for hot groundwater, rich in silicon, from surrounding rocks. The cooled water formed large quantities of silica-rich quartz in the openings created by the cracks. In some places, perfect and pure quartz crystals were able to form: rock crystal. The giant cluster is a wonderful addition to the exhibition in the "Earth" gallery at Naturalis, which focuses on geological processes and the structure of our planet.
More information can be found on the Naturalis website
( Source press releases Naturalis )
