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  2. Diamond - Wikipedia

    en.wikipedia.org/wiki/Diamond

    Although diamonds on Earth are rare, they are very common in space. In meteorites , about three percent of the carbon is in the form of nanodiamonds , having diameters of a few nanometers. Sufficiently small diamonds can form in the cold of space because their lower surface energy makes them more stable than graphite.

  3. Diamond (gemstone) - Wikipedia

    en.wikipedia.org/wiki/Diamond_(gemstone)

    Diamonds with higher color grades are rarer, in higher demand, and therefore more expensive, than lower color grades. Oddly enough, diamonds graded Z are also rare, and the bright yellow color is also highly valued. Diamonds graded D–F are considered "colorless", G–J are considered "near-colorless", K–M are "slightly colored".

  4. Diamonds aren't as rare as you might think, scientists say - AOL

    www.aol.com/finance/2015-11-04-diamonds-arent-as...

    New research has led scientists to believe that diamonds may actually be easier to acquire than previously thought, and less expensive as a result. Diamonds aren't as rare as you might think ...

  5. Extraterrestrial diamonds - Wikipedia

    en.wikipedia.org/wiki/Extraterrestrial_diamonds

    Although diamonds on Earth are rare, extraterrestrial diamonds (diamonds formed outside of Earth) are very common. Diamonds so small that they contain only about 2000 carbon atoms are abundant in meteorites , and some of them formed in stars before the Solar System existed. [ 1 ]

  6. Why do we put so much worth in diamonds? - AOL

    www.aol.com/why-put-much-worth-diamonds...

    That might be because the stone's name comes from the Greek word adamas, or "unconquerable." ... SEE MORE: This 15-carat rare pink diamond sold for $31.5 million.

  7. Rare cache of pink diamonds formed when a supercontinent ...

    www.aol.com/research-may-offer-clue-search...

    Pink diamonds are extremely rare and coveted — a now-closed mine in Australia has been the source of 90% of the colored gemstones. Polished pink specimens of the highest grade can sell for tens ...

  8. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    In diamonds, the cut is the primary determinant of value, followed by clarity and color. An ideally cut diamond will sparkle, to break down light into its constituent rainbow colors (dispersion), chop it up into bright little pieces (scintillation), and deliver it to the eye (brilliance).

  9. Material properties of diamond - Wikipedia

    en.wikipedia.org/wiki/Material_properties_of_diamond

    Type II diamonds have very few if any nitrogen impurities. Pure (type IIa) diamond can be colored pink, red, or, brown owing to structural anomalies arising through plastic deformation during crystal growth; [20] these diamonds are rare (1.8% of gem diamonds), but constitute a large percentage of Australian diamonds. Type IIb diamonds, which ...

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