File:Earthy hematite (Black Hills, South Dakota, USA) 8.jpg
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Summary
[edit]DescriptionEarthy hematite (Black Hills, South Dakota, USA) 8.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 5800 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.
The oxide minerals all contain one or more oxide anions (O-2). Hematite is a common iron oxide mineral (Fe2O3). It varies in appearance, from nonmetallic-lustered and brick red-colored to metallic-lustered and silvery-gray colored. Brick red hematite is often powdery / earthy or finely granular or oolitic. Silvery-gray hematite (micaceous hematite) is less common and results from mild to moderate levels of metamorphism. Hematite ranges in hardness from soft to moderately hard (about 1 to 6 on the Mohs Hardness Scale). Regardless of a specimen’s color or luster, hematite will always leave a brick red-colored streak, which is its most diagnostic physical property. This specimen is earthy hematite, sometimes referred to as "red ochre". Locality: undisclosed / unrecorded site (attributed to the town of Custer) in the Black Hills, western South Dakota, USA Photo gallery of hematite: www.mindat.org/gallery.php?min=1856 |
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Source | https://www.flickr.com/photos/47445767@N05/52674052900/ |
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@N05/52674052900. It was reviewed on 7 February 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
7 February 2023
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current | 16:39, 7 February 2023 | ![]() | 2,236 × 1,658 (2.64 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52674052900/ with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/11 |
ISO speed rating | 80 |
Date and time of data generation | 14:54, 30 January 2023 |
Lens focal length | 11.614 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 18.0 (Macintosh) |
File change date and time | 18:59, 6 February 2023 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 14:54, 30 January 2023 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.90625 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
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Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual 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 | 13:59, 6 February 2023 |
Unique ID of original document | 8224EC458D8F64DD3DC566AE8AAAAE7A |
IIM version | 32,767 |