File:Nephrite jade with quartz crystals (Precambrian; Wyoming, USA) 1 (24393804579).jpg
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[edit]DescriptionNephrite jade with quartz crystals (Precambrian; Wyoming, USA) 1 (24393804579).jpg |
Nephrite jade with quartz crystals from the Precambrian of Wyoming, USA. (public display, National Rockhound Hall of Fame, Murdo, South Dakota, USA) Nephrite jade (nephritite) is a crystalline-textured to felted-textured metamorphic rock principally composed of one or more amphibole minerals (tremolite to actinolite, Ca2Mg5Si8O22(OH)2 to Ca2(Mg,Fe)5Si8O22(OH)2). Nephrite jade was discovered in Wyoming in the 1930s, resulting in a "jade rush" that lasted for several decades. Most recovered material is alluvial jade, produced by paleoerosion of jade outcrops. Eroded clasts of jade were transported downstream and subsequently buried with other poorly-sorted sediments. Some Wyoming jade has been collected from in-situ outcrops. The dark green to black nephrite jade shown above has some inclusions of whitish-colored, hexagonal quartz crystals. Age: Precambrian (probably Proterozoic) Locality: unrecorded/undisclosed locality in Wyoming, USA |
Date | |
Source | Nephrite jade with quartz crystals (Precambrian; Wyoming, USA) 1 |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/24393804579 (archive). It was reviewed on 30 November 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
30 November 2019
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current | 16:50, 30 November 2019 | ![]() | 2,930 × 1,744 (4.28 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D70s |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/5.6 |
Date and time of data generation | 09:35, 6 August 2011 |
Lens focal length | 112 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 18:43, 1 February 2016 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 09:35, 6 August 2011 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 4.9 APEX (f/5.46) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash fired, strobe return light detected, auto mode |
DateTime subseconds | 80 |
DateTimeOriginal subseconds | 80 |
DateTimeDigitized subseconds | 80 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 168 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Soft |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Supported Flashpix version | 1 |
Image width | 2,930 px |
Image height | 1,744 px |
Date metadata was last modified | 13:43, 1 February 2016 |