File:Peridot crystal (51742300233).jpg
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DescriptionPeridot crystal (51742300233).jpg |
English: Peridot from Deep Inside the Earth's Mantle, and ejected by volcanism in Pakistan. Only Peridot and certain diamonds, like the boron-blue Hope Diamond, come from this deep in the Earth. We have never drilled to the mantle, so these minerals brought from below are our only samples. The green peridot crystals are also seen in certain meteorites that came from planets and planetoids older than Earth itself. Examples below, with similar orthorhombic cleavage across several celestial bodies formed independently.
The peridot comes from slowly cooling magma melt, a viscous flow taking one billion years to circulate on Earth. It is brought to the surface as a volcanic eruption, sometimes as a volcanic "bomb" or as a cataclysmic collision in space between planetoids or proto-planets destroyed before the Earth formed. My Earth sample is 193 Ct. From UT: "Crystals very rare... Unlike most other gems, olivine is highly susceptible to chemical weathering and thus does not survive very long at the surface in wet climates. This fact probably accounts for the very limited number of known gem localities" |
Date | |
Source | https://www.flickr.com/photos/jurvetson/51742300233/ |
Author | Steve Jurvetson |
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This image was originally posted to Flickr by jurvetson at https://flickr.com/photos/44124348109@N01/51742300233. It was reviewed on 13 December 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
13 December 2021
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current | 04:04, 13 December 2021 | 1,795 × 2,177 (787 KB) | Sv1xv (talk | contribs) | Uploaded a work by Steve Jurvetson from https://www.flickr.com/photos/jurvetson/51742300233/ with UploadWizard |
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Camera manufacturer | SONY |
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Camera model | DSC-RX100M3 |
Exposure time | 1/30 sec (0.033333333333333) |
F-number | f/2.8 |
ISO speed rating | 125 |
Date and time of data generation | 12:17, 12 December 2021 |
Lens focal length | 8.8 mm |
Orientation | Normal |
Horizontal resolution | 350 dpi |
Vertical resolution | 350 dpi |
Software used | DSC-RX100M3 v1.20 |
File change date and time | 12:17, 12 December 2021 |
Y and C positioning | Centered |
Exposure Program | Normal program |
Exif version | 2.3 |
Date and time of digitizing | 12:17, 12 December 2021 |
Meaning of each component |
|
Image compression mode | 2 |
APEX brightness | 3.5640625 |
APEX exposure bias | 0 |
Maximum land aperture | 1.6953125 APEX (f/1.8) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
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 | 24 mm |
Scene capture type | Standard |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Lens used | Sony 24-70mm F1.8-2.8 |
IIM version | 2 |