File:Kunzite 5.jpg
Original file (1,873 × 1,026 pixels, file size: 1.06 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionKunzite 5.jpg |
English: (~1.2 centimeter across)
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. The silicates are the most abundant and chemically complex group of minerals. All silicates have silica as the basis for their chemistry. "Silica" refers to SiO2 chemistry. The fundamental molecular unit of silica is one small silicon atom surrounded by four large oxygen atoms in the shape of a triangular pyramid - this is the silica tetrahedron - SiO4. Each oxygen atom is shared by two silicon atoms, so only half of the four oxygens "belong" to each silicon. The resulting formula for silica is thus SiO2, not SiO4. The simplest and most abundant silicate mineral in the Earth's crust is quartz (SiO2). All other silicates have silica + impurities. Many silicates have a significant percentage of aluminum (the aluminosilicates). Kunzite is a pinkish-purplish, gem-quality variety of spodumene, a lithium aluminosilicate mineral - LiAlSi2O6. Spodumene is usually grouped with the pyroxenes. It has a nonmetallic luster that ranges from glassy on fresh specimens to dull on weathered/altered specimens. It can look like feldspar. Weathered/altered spodumene in mine dumps often has the appearance of wood ("decayed spodumene"). Spodumene is fairly hard (H=6.5 to 7), varies in color, and has two cleavage planes at nearly perfect corners (near 90º). Crystals show striations trending along the long axis. Locality: undisclosed Photo gallery of kunzite: www.mindat.org/gallery.php?min= 2289 Photo gallery of spodumene: www.mindat.org/gallery.php?min= 3733 |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/53417776095/ |
Author | James St. John |
Licensing
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/53417776095. It was reviewed on 28 December 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
28 December 2023
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 20:52, 28 December 2023 | 1,873 × 1,026 (1.06 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/53417776095/ 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 | 1/60 sec (0.016666666666667) |
F-number | f/11 |
ISO speed rating | 80 |
Date and time of data generation | 20:10, 11 December 2022 |
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 20.0 (Macintosh) |
File change date and time | 23:25, 23 December 2023 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 20:10, 11 December 2022 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.90625 |
APEX exposure bias | −1 |
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 |
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 | 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 | 18:25, 23 December 2023 |
Unique ID of original document | 37E87C354DA8BCD77E3B1C53E4FCF6BD |