File:Bloodstone 4 (49036280821).jpg
![File:Bloodstone 4 (49036280821).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/2/23/Bloodstone_4_%2849036280821%29.jpg/766px-Bloodstone_4_%2849036280821%29.jpg?20191205020828)
Original file (3,015 × 2,360 pixels, file size: 4.01 MB, MIME type: image/jpeg)
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Summary
[edit]DescriptionBloodstone 4 (49036280821).jpg |
(~12.6 centimeters across at its widest) Bloodstone is a chert-like rock that is composed of cryptocrystalline quartz. It consists of a mix of deep green and deep red quartz. By itself, deep green cryptocrystalline quartz is called "plasma", and the deep red variety is called "jasper". Bloodstone, or "heliotrope", is plasma with spots or streaks or patches of jasper. I have never in my life seen a bloodstone sample with provenance information. Surprisingly, there is little to no technical geologic literature on bloodstone - at least, none that is available and out in the open. This specimen has zero information about its locality and geologic context. Many claim that most bloodstone comes from India. If this sample is Indian in origin, it is possibly derived from a fracture fill in Deccan Traps basalt lava flows (= Cretaceous-Tertiary boundary times), and possibly from the Kathiawar Peninsula in western India. |
Date | |
Source | Bloodstone 4 |
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@N05/49036280821 (archive). It was reviewed on 5 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
5 December 2019
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:08, 5 December 2019 | ![]() | 3,015 × 2,360 (4.01 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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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/10 |
ISO speed rating | 80 |
Date and time of data generation | 16:03, 8 November 2019 |
Lens focal length | 9.681 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 16.0 (Macintosh) |
File change date and time | 20:31, 8 November 2019 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 16:03, 8 November 2019 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.65625 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 3.625 APEX (f/3.51) |
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Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
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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 | Portrait |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 15:31, 8 November 2019 |
Unique ID of original document | 6F22146577044F6665A7A0D82914B95C |