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Four Peaks is the site of an amethyst mine that produces top-grade amethyst. The name Four Peaks is a reference to the four distinct peaks of a north–south ridge forming the massif's summit. The northernmost peak is named Brown's Peak and is the tallest of the four at 7,659 feet (2,334 m). [1] It is the highest point in Maricopa County.
The ridge is known for its abundance of amethyst, opal and petrified wood. It was referred to as Specimen Mountain by local miners and was probably named by prospectors well before 1870. [ 2 ] The south side of the ridge is traversed by the 18.8-mile (30.3 km) Specimen Ridge Trail between Tower Junction and Soda Butte Creek .
Weavers Needle from Peralta Canyon. Weavers Needle is a 1,000-foot-high (300 m) column of rock that forms a distinctive peak visible for many miles around. Located in the Superstition Mountains east of Phoenix, Arizona, Weavers Needle was created when a thick layer of tuff (fused volcanic ash)—a volcanic plug [3] —was heavily eroded, creating the spire as an erosional remnant with a summit ...
Amethyst Mountain, el. 9,609 feet (2,929 m) [1] is the highest peak and central part of a northwest – southeast trending ridge that lies between the Lamar River to the northeast and Deep Creek to the southwest within Park County, Wyoming.
Copper Mountain is home to several mines, including those for uranium. [8] Three of the four uranium mines in Wyoming are still producing. The Arrowhead Mine on Copper Mountain produced around 500,000 pounds of Uranium in the 1960s and 70s. [9] Copper Mountain was also mined for iron, some of which were discovered in the 1950s. [10]
Lady Peak is a mountain located just southeast of Cheam Peak in the Cheam Range near Chilliwack, British Columbia.It is west of the four peaks in the eastern portion of the range known as The Lucky Four Group or The Lucky Four, [3] consisting of Knight, Foley, Stewart and Welch peaks.
Agate, primarily in the form of chalcedony, and crystalline quartz (sometimes in the form of amethyst), are prominent in the ancient lava flows of the Watchungs and typically, are seen as embedded nodules along exposed fronts. Datolite, another nodular mineral, has been found embedded in the volcanic rock around the Great Falls.
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.