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Hübnerite is a mineral consisting of manganese tungsten oxide, with a chemical formula MnWO4. It typically occurs in association with high-temperature hydrothermal vein deposits and altered granites and in alluvial deposits. Hübnerite is the manganese endmember of the wolframite solid solution series, with ferberite (FeWO4) the opposite iron endmember. Color differences between members of the wolframite family are clear and marked, with the color of hübnerite varying from yellowish brown to reddish brown. It was first described in 1865 for an occurrence in the US state of Nevada and was named after the German mining engineer and metallurgist Adolf Hübner. This stacked image, composed of 38 individual photographs, shows red hübnerite crystals with quartz extracted from the Pasto Bueno mine in Pallasca Province, Peru.Photograph credit: Ivar Leidus
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Stairway to Heaven at Point Reyes.
Point Reyes Lighthouse in fog.
One of the residence halls at CSUMB.
Fog in Monterey. View from one of the residence halls at CSUMB.
Freeman Field filling up for graduation commencement ceremony at CSUMB.
Real soldier training in progress during a tour of Fort Ord.
Hollywood's Kodak Theater, where the Academy Awards has recently been held.
Michael Moore speaks at the Greek Theater on the UC Berkeley campus.
Construction status of Tanimura & Antle Family Library at CSUMB in May 2008.
Road sign for Skunk Train.
Jolly Giant Commons at Humboldt State University.
Juniper Hall at Humboldt State.
Fort Ord Public Lands.
Stereoscopic picture of piano keys.
Alionic landscape of Point Lobos.
Awesome alien rock formations at Point Lobos.
Sunset in Downtown LA.
Ocean view from North Quad Apartments at CSUMB. Suites shown.
Volleyball field in North Quad of CSUMB at night.
See my eyes, which have the condition of central heterochromia.
San Francisco Fire, 1906.
Red eyed tree frog, whose skin secretions could destroy HIV.
Child with polio deformity.
Heterochromia within a cat.
Golden Gate Bridge in San Francisco.
Time lapse photography of planet Jupiter.
Waterspout.
President George W. Bush and President-elect Barack Obama meet in the Oval Office of the White House Monday, Nov. 10, 2008.
Half Moon Bay.
Wiggle stereoscopy, which quickly alternates left and right views of a stereogram.
Artistic rendering of Earth impact.
Russ Meyer and Roger Ebert.
Electric car for 2010 release.
Yosemite Valley.
Tsunami at Thailand, 2004.
Colin Mochrie.
Ghirardelli Square in SF.
Home Theater with projection in HD.
The associated projected screen.
Two men sleeping on a bench.
Border collie.
An adult gorilla using a walking stick to determine the water's depth, proof that gorillas use tools, too.
Daguerreotype of Edgar Allen Poe.
The supposed "killer rabbit" that attacked former President Jimmy Carter.
Painting: "His Station and Four Aces," by Cassius Marcellus Coolidge.
SF's Metreon at night.
An MRI of a human brain.
Inside a BART car.
An In-N-Out Burger catering truck.
Optical illusion of vanity.
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