File:Ulexite (Kern County, California, USA).jpg
Original file (2,053 × 1,771 pixels, file size: 2.04 MB, MIME type: image/jpeg)
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Summary
[edit]DescriptionUlexite (Kern County, California, USA).jpg |
English: A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 5900 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.
Ulexite is a rare borate mineral that forms in some arid lacustrine and desert salt flat environments. Its formula is NaCaB5O6(OH)6·5H2O - hydrous sodium calcium hydroxy-borate. It often forms compact, fibrous masses. When cut perpendicular to the fibers and then polished, pieces of ulexite display fiber-optic properties. In this photo, the background text is not visible because the mineral specimen is transparent; instead, the image has been lifted to the top surface. Such pieces are nicknamed "TV rock". Ulexite has a nonmetallic luster, a clearish to whitish color (impure specimens that have inclusions of fine-grained sediments are mottled grayish), a white streak, and is moderately soft - 2.5 on the Mohs Hardness Scale. Locality: unrecorded / undisclosed site in Kern County, southern California, USA Photo gallery of ulexite: www.mindat.org/gallery.php?min=4085 |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/53197347572/ |
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@N05/53197347572. It was reviewed on 19 September 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
19 September 2023
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:25, 19 September 2023 | 2,053 × 1,771 (2.04 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/53197347572/ with UploadWizard |
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/80 sec (0.0125) |
F-number | f/4.9 |
ISO speed rating | 320 |
Date and time of data generation | 15:30, 5 October 2011 |
Lens focal length | 18.6 mm |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 20.0 (Macintosh) |
File change date and time | 22:49, 18 September 2023 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 15:30, 5 October 2011 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 6.3125 |
APEX aperture | 4.59375 |
APEX exposure bias | 0 |
Maximum land aperture | 4.59375 APEX (f/4.91) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 18:49, 18 September 2023 |
Unique ID of original document | DEA5EFEA712C58E43CB9B3C57AB78FE4 |