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The new exhibits explore a range of topics, including the diversification of mineral species over the course of Earth's history, plate tectonics, and the stories of specific gems. [7] They have adopted newer philosophies in exhibit design, including a focus on storytelling, interactivity, and connecting ideas across disciplines. [7]
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. Its estimated value is US $190,000, although it is not for sale. [1]
In subsequent decades, it was augmented primarily by gifts, including Andrew Carnegie's 1904 donation of the notable mineral collection of William W. Jefferis of West Chester, Pennsylvania (about 12,000 specimens), and a donation in 1902 of 2,600 gems from John L. Lewis, President of the Lewis Foundry & Machine Company located in Groveton ...
The lapidary arts form the core of the Lizzadro Museum's collections, particularly jade carvings including the Altar of the Green Jade Pagoda by Chang Wen-Ti. [7] However, the museum also displays a selection of uncarved gemstones, fossils, and other minerals, as well as sculptures, mosaics, dioramas, and a miniature castle made of carved stone and gold called "Castle Lizzadro" by William ...
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]
The museum opened a new gallery in January 2003 to feature petrified wood. [9] Rudy W. Tschernich was named curator in June 2003, replacing Sharleen Harvey. [ 10 ] In 2004 the Cascadia Meteorite Laboratory at Portland State University loaned the museum 52 meteorites in an exhibit funded by NASA .
Prasiolite (also known as green quartz, green amethyst or vermarine) is a green variety of quartz. Since 1950, almost all natural prasiolite has come from a small Brazilian mine, [citation needed] but it has also been mined in the Lower Silesia region of Poland. Naturally occurring prasiolite has also been found in the Thunder Bay area of ...
Heat can either improve or spoil gemstone color or clarity. The heating process has been well known to gem miners and cutters for centuries, and in many stone types heating is a common practice. Most citrine is made by heating amethyst, and partial heating with a strong gradient results in "ametrine" – a stone partly amethyst and partly citrine.