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{{POTD {{{1|{{{style|default}}}}}} {{POTD {{{1|{{{style|default}}}}}}
|image=Diamond (side view).png |image=Diamond (side view).png
|size=380 |size=400
|title=] |title=]
|texttitle=Diamond |texttitle=Diamond
|alttext=Cathodoluminescence of a round-cut diamond
|caption= |caption=


''']''' is a ] with its atoms arranged in a ] called ]. Diamond is ] at ]: it converts to the ] form ] under those conditions, but at a negligible rate. Diamond has the highest ] and ] of any natural material, properties that are used in major industrial applications such as cutting and polishing tools. In addition to its industrial uses, diamond is much sought-after ] for use in jewelry. Most natural diamonds have ages between 1 billion and 3.5 billion years and formed at depths between 150 and 250 kilometres in the ]. They were then carried to the surface more recently in volcanic eruptions and deposited in ]s known as ]s and ]s. This photograph shows the real-color ] of a diamond, in a ]. ''']''' is a ] with its atoms arranged in a ] known as ]. It is ] at ], converting to the ] form ] under those conditions but at a negligible rate. Diamond has the highest ] and ] of any natural material, properties that are useful in major industrial applications such as cutting and polishing tools. In addition to its industrial uses, ] for use in jewelry. Most natural diamonds were formed between 1&nbsp;billion and 3.5&nbsp;billion years ago, at depths between 150 to 250 kilometres (93 to 155&nbsp;mi) in the ]. They were then carried to the surface more recently in volcanic eruptions and deposited in ]s known as ]s and ]s. This photograph shows the ] of a round-cut diamond, taken with the use of a ]. The image has a field of view of 3.45 millimetres (0.136&nbsp;in).


|credit=Photograph credit: ] |credit=Photograph credit: Pavel Somov
}}<noinclude>] }}<noinclude>]


</noinclude>
== See also ==
* ]</noinclude>

Latest revision as of 00:00, 30 January 2024

Picture of the day archives: 2023 December < 2023 December 29 2023 December 31 > Picture of the day Cathodoluminescence of a round-cut diamond Diamond is a solid form of carbon with its atoms arranged in a crystal structure known as diamond cubic. It is metastable at standard temperature and pressure, converting to the chemically stable form graphite under those conditions but at a negligible rate. Diamond has the highest hardness and thermal conductivity of any natural material, properties that are useful in major industrial applications such as cutting and polishing tools. In addition to its industrial uses, diamond is much sought-after as a gemstone for use in jewelry. Most natural diamonds were formed between 1 billion and 3.5 billion years ago, at depths between 150 to 250 kilometres (93 to 155 mi) in the Earth's mantle. They were then carried to the surface more recently in volcanic eruptions and deposited in igneous rocks known as kimberlites and lamproites. This photograph shows the cathodoluminescence of a round-cut diamond, taken with the use of a scanning electron microscope. The image has a field of view of 3.45 millimetres (0.136 in).Photograph credit: Pavel Somov Archive – More featured pictures...


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