enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Extraterrestrial diamonds - Wikipedia

    en.wikipedia.org/wiki/Extraterrestrial_diamonds

    On the Earth's surface, graphite is the stable carbon mineral, while larger diamonds can only be formed in the kind of temperatures and pressures that are found deep in the mantle. However, nanodiamonds are close to molecular size: one with a diameter of 2.8 nm, the median size, contains about 1800 carbon atoms. [ 5 ]

  3. There are over a quadrillion tons of diamonds lurking 100 ...

    www.aol.com/article/news/2018/07/16/scientists...

    That diamond on your wedding ring isn't as rare as you might think, according to new research. There are over a quadrillion tons of diamonds lurking 100 miles below the Earth's surface, according ...

  4. A tech company is growing diamonds in the desert - AOL

    www.aol.com/news/tech-company-growing-diamonds...

    “The mined diamond, you don’t control it, the Earth is doing it.” To grow a diamond, you start with a diamond, either lab-grown or mined, explains Sabeg. It’s called a “seed” and is ...

  5. Kimberlite - Wikipedia

    en.wikipedia.org/wiki/Kimberlite

    Kimberlites act as carriers for these diamonds, transporting them to the Earth's surface. The discovery of diamond-bearing kimberlites in the 1870s in Kimberley sparked a diamond rush, transforming the area into one of the world’s largest diamond-producing regions. Since then, the association between kimberlites and diamonds has been crucial ...

  6. Portal:Minerals - Wikipedia

    en.wikipedia.org/wiki/Portal:Minerals

    Diamond also has a very high refractive index and a relatively high optical dispersion. Most natural diamonds have ages between 1 billion and 3.5 billion years. Most were formed at depths between 150 and 250 kilometres (93 and 155 mi) in the Earth's mantle, although a few have come from as deep as 800 kilometres (500 mi). Under high pressure ...

  7. Rare blue diamonds may be Earth's deepest secret - AOL

    www.aol.com/news/2018-08-02-rare-blue-diamonds...

    Blue diamonds comprise only about 0.02 percent of mined diamonds but include some of the world's most famous jewels. Diamonds are a crystalline form of pure carbon, forming under enormous heat and ...

  8. List of largest rough diamonds - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_rough_diamonds

    This is a partial list of the largest non-synthetic diamonds with a rough stone (uncut) weight of over 200 carats (40 grams). [1] The list is not intended to be complete—e.g., the Cullinan (formerly Premier) mine alone has produced 135 diamonds larger than 200 carats since mining commenced.

  9. Lonsdaleite - Wikipedia

    en.wikipedia.org/wiki/Lonsdaleite

    Lonsdaleite (named in honour of Kathleen Lonsdale), also called hexagonal diamond in reference to the crystal structure, is an allotrope of carbon with a hexagonal lattice, as opposed to the cubical lattice of conventional diamond. It is found in nature in meteorite debris; when meteors containing graphite strike the Earth, the immense heat and ...