File:Synthetic sapphire 3.jpg
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Summary
| DescriptionSynthetic sapphire 3.jpg |
English: (15 millimeters across at its widest)
This brilliant cut, synthetic blue sapphire was manufactured by the Verneuil process. Sapphire is aluminum oxide (Al2O3). In nature, this chemical is called corundum. Gem-quality corundum of any color except red is called "sapphire". When red, it is called "ruby". Corundum has a nonmetallic luster, can be any color, has a white streak, and a hardness of 9 on the Mohs Hardness Scale. It forms hexagonal crystals with flat ends and has no cleavage. See info. at: en.wikipedia.org/wiki/Sapphire and en.wikipedia.org/wiki/Verneuil_process |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/49518594482/ |
| Author | James St. John |
Licensing
This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/49518594482 (archive). It was reviewed on 11 February 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
11 February 2020
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 09:51, 6 April 2025 |  | 1,264 × 1,258 (844 KB) | smartcommons>Mangroves | Cropped 50 % horizontally, 50 % areawise using CropTool with lossless mode. |
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