Tuesday, July 28, 2009
Aqua Amethyst Geode Fountain With Light And Crystal Sphere
The Fountain Factory produces dazling fountains from precious Amethyst Geodes and each is a specimen, no two are alike. Enjoy the beauty of a rotating crystal sphere that floats on a thin film of water and is illuminated with a built in light unit. Stone type: Amethyst Geode With A Crystal Quartz Sphere Dimensions: 43'' Total Height. Geode Dimensions: 19'' Tall, 18'' Wide. 24.5'' Diameter Black Onyx/Black & White Agate Stand Bowl. Weight: 190 Lbs. This item ships via Roadway Express Truck.
Geodes (Greek γεώδης - geōdēs, "earthlike") are geological rock formations which occur in sedimentary and certain volcanic rocks. Geodes are essentially rock cavities or vugs with internal crystal formations or concentric banding. The exterior of the most common geodes is generally limestone or a related rock, while the interior contains quartz crystals and/or chalcedony deposits. Other geodes are completely filled with crystal, being solid all the way through. These types of geodes are called nodules.
Geodes can form in any cavity, but the term is usually reserved for more or less rounded formations in igneous and sedimentary rocks, while the more general term "vug" is applied to cavities in fissures and veins. They can form in gas bubbles in igneous rocks, such as vesicles in basaltic lavas, or as in the American Midwest, rounded cavities in sedimentary formations. After rock surrounding the cavity hardens, dissolved silicates and/or carbonates are deposited on the inside surface. Over time, this slow feed of mineral constituents from groundwater or hydrothermal solutions allows crystals to form inside the hollow chamber. Bedrock containing geodes eventually weathers and decomposes, leaving them present at the surface if they are composed of resistant material such as quartz.