File:Millerite in geode (Harrodsburg, Indiana, USA).jpg
![File:Millerite in geode (Harrodsburg, Indiana, USA).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/5/53/Millerite_in_geode_%28Harrodsburg%2C_Indiana%2C_USA%29.jpg/800px-Millerite_in_geode_%28Harrodsburg%2C_Indiana%2C_USA%29.jpg?20150624051447)
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Summary
[edit]DescriptionMillerite in geode (Harrodsburg, Indiana, USA).jpg |
Millerite in a chalcedony-lined geode from Indiana, USA. (public display, Cincinnati Museum of Natural History & Science, Cincinnati, Ohio, USA) 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 4900 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 sulfide minerals contain one or more sulfide anions (S-2). The sulfides are usually considered together with the arsenide minerals, the sulfarsenide minerals, and the telluride minerals. Many sulfides are economically significant, as they occur commonly in ores. The metals that combine with S-2 are mainly Fe, Cu, Ni, Ag, etc. Most sulfides have a metallic luster, are moderately soft, and are noticeably heavy for their size. These minerals will not form in the presence of free oxygen. Under an oxygen-rich atmosphere, sulfide minerals tend to chemically weather to various oxide and hydroxide minerals. Millerite is an odd, scarce nickel sulfide mineral (NiS). It tends to form radiating clusters or tufts of long, hairlike needles. Some geodes in the Mississippian limestone outcrop belts of America’s Upper Mississippi Valley & Ohio Valley have millerite inside. Millerite crystals are very slender hexagonal needles with a metallic luster and a brassy-gold color. Locality: roadcut along Rt. 37 at or near Harrodsburg, southern Monroe County, southern Indiana, USA Photo gallery of millerite: www.mindat.org/gallery.php?min=2711 |
Date | |
Source | Millerite in geode (Harrodsburg, Indiana, USA) 2 |
Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/18675849770. It was reviewed on 23 June 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
23 June 2015
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current | 05:14, 24 June 2015 | ![]() | 1,945 × 1,373 (2.09 MB) | Tillman (talk | contribs) | Cropped 14 % horizontally and 10 % vertically using CropTool with lossless mode. |
22:39, 23 June 2015 | ![]() | 2,254 × 1,531 (2.68 MB) | Tillman (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Camera manufacturer | NIKON CORPORATION |
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Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/5.6 |
ISO speed rating | 200 |
Date and time of data generation | 12:45, 21 March 2007 |
Lens focal length | 200 mm |
Width | 3,008 px |
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Bits per component |
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Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 11:40, 16 June 2015 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 12:45, 21 March 2007 |
Meaning of each component |
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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 | 300 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Lens used | 18.0-200.0 mm f/3.5-5.6 |
Serial number of camera | 1004a0cc |
Date metadata was last modified | 07:40, 16 June 2015 |
Unique ID of original document | 6D28ED229D076CA444CB781C022D21D3 |