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Multicolored rough opal specimen from Virgin Valley, Nevada, US. The Virgin Valley [39] opal fields of Humboldt County in northern Nevada produce a wide variety of precious black, crystal, white, fire, and lemon opal. The black fire opal is the official gemstone of Nevada. Most of the precious opal is partial wood replacement.
The downstream Nevada half of the valley has the very beginnings of Lake Mead, about 20 miles (32 km) upstream, where the Virgin River used to flow. Littlefield, AZ in the valley's northeast [ 4 ] is located at 36°54′0″N 113°56′0″W / 36.90000°N 113.93333°W / 36.90000; -113.
The refuge contains the very active and popular Virgin Valley Opal Mining District whose mineral rights were grandfathered-in with the establishment of the sanctuary. [3] Rockhounds search for precious opal, agates, petrified wood, carnelian, obsidian, rhyolite, jasper, hyalite opal, and psilomelane, among other semiprecious gemstones.
Nevada [46] [47] Metal: Silver (1977); Nevada's nickname is the Silver State: Sandstone (1987) Precious Gemstone: Virgin Valley black fire opal (1987) Semiprecious Gemstone: Nevada turquoise (1987) New Hampshire [48] Beryl (1985) Granite (1985); New Hampshire's nickname is the Granite State: Smoky quartz (1985) New Jersey [49] Franklinite [50 ...
In 1908 more discoveries were made in the Virgin Valley area in beds being exploited for opal. There naturally occurring casts of twigs, limbs, and cracks of petrified wood were found. [1] In 1912 a slab of rock preserving fish, a primitive horse, mollusks, and plants, near Esmeralda Field. [12]
Antelope Valley (Nevada) B. Big Smoky Valley; Bitter Spring Valley; C. ... Virgin Valley; Y. Yucca Forest This page was last edited on 24 February 2022, at 16:54 ...
Opalescence or play of color is an optical phenomenon associated with the mineraloid gemstone opal, [1] a hydrated silicon dioxide. [2] This effect appears as a milky, translucent glow that changes with the angle of light, often creating a soft, pearly sheen that can display various colors or hues.
Nevada's Virgin Valley is a source for precious black opal gemstones and replacing woods. Her next career started in 1915 when she was sent to investigate the discovery of opals in Virgin Valley, Nevada, 400 miles (640 km) from San Francisco.