Diamond
The most precious gem is the diamond, made of carbon. The characteristics that make it so valuable are: its hardness, un-alterability, brightness and transparency. The most common diamonds are usually colourless. However the most popular ones tend to have a pale yellow or brown colour. Red, green and blue diamonds are extremely rare and expensive. India is the country where the first deposits were discovered. Now those deposits have been exhausted, while relevant quantities are still present in Brazil and South Africa.
Special reports
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8 November 2013
Magnets and superconductors
Which one of us has not played at attracting small pieces of iron with a magnet?
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13 May 2013
Small steps, great footprints
Have you ever wondered how much space is taken up by an apple or a steak?...
18 January 2016
Ten years of oil demand
Eni has recently published the 14th edition of the 2015 World Oil and Gas Review...
28 August 2020
The Earth seen from above: signs of fires
This image was taken by the ASTER sensor installed on the NASA TERRA satellite platform. The image was taken on…
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15 July 2020
Earth viewed from above
Remote satellite sensing: what it is and what it is used for In the scientific field, the images produced by…
30 April 2019
Urban woods
When walking along a tree-lined avenue in a crowded and traffic-congested city, wrapped up in our daily commitments, we do…
12 April 2019
Easter with extinct friends
Easter Island is shaped like a triangle with three extinct volcanoes placed at the vertices, and has a total area…
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8 November 2013
Magnets and superconductors
Which one of us has not played at attracting small pieces of iron with a magnet?
-
13 May 2013
Small steps, great footprints
Have you ever wondered how much space is taken up by an apple or a steak?...
-
18 January 2016
Ten years of oil demand
Eni has recently published the 14th edition of the 2015 World Oil and Gas Review...
28 August 2020
The Earth seen from above: signs of fires
This image was taken by the ASTER sensor installed on the NASA TERRA satellite platform. The image was taken on…
-
8 November 2013
Magnets and superconductors
Which one of us has not played at attracting small pieces of iron with a magnet?
From the Multimedia section
Facts
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Volcanic activity of Vesuvio
One of the most famous volcanic disasters was the eruption of Vesuvio in 79 A.D....
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Mountains on the Earth
The different landscapes that we analysed in the previous section are distributed...
And in underground tunnels?
There are groups of terrestrial animals that eat insects, worms and other invertebrates...
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An artificial geyser
Electric and thermal power produced from geothermal energy depend on the existence of underground infiltrations...
Laterite and bauxite deposits
These deposits can be observed in those tropical areas that are characterized by...
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13 May 2011
Volcanic eruptions
The activity of some volcanoes is characterized by violent explosions...
Volcanic activity of Vesuvio
One of the most famous volcanic disasters was the eruption of Vesuvio in 79 A.D....
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Mountains on the Earth
The different landscapes that we analysed in the previous section are distributed...
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24 February 2011
And in underground tunnels?
There are groups of terrestrial animals that eat insects, worms and other invertebrates...
-
13 May 2011
Volcanic eruptions
The activity of some volcanoes is characterized by violent explosions...
-
Volcanic activity of Vesuvio
One of the most famous volcanic disasters was the eruption of Vesuvio in 79 A.D....