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  2. Gemology - Wikipedia

    en.wikipedia.org/wiki/Gemology

    For example, a ruby from Myanmar (Burma) will have definite internal and optical activity variance from a Thai ruby. When the gemstones are in a rough state, the gemologist studies the external structure; the host rock and mineral association; and natural and polished color.

  3. Diamond (gemstone) - Wikipedia

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

    The quality of a diamond's cut is widely considered the most important of the four Cs in determining the beauty of a diamond; indeed, it is commonly acknowledged that a well-cut diamond can appear to be of greater carat weight, and have clarity and color appear to be of better grade than they actually are.

  4. Jewellery - Wikipedia

    en.wikipedia.org/wiki/Jewellery

    A gold, diamonds and sapphires red guilloché enamel "Boule de Genève", a type of pendant watch used as an accessory for women. An example of an object which is functional, artistic/decorative, marker of social status or a symbol of personal meaning. Humans have used jewellery for a number of different reasons:

  5. Diamond - Wikipedia

    en.wikipedia.org/wiki/Diamond

    The boundary between gem-quality diamonds and industrial diamonds is poorly defined and partly depends on market conditions (for example, if demand for polished diamonds is high, some lower-grade stones will be polished into low-quality or small gemstones rather than being sold for industrial use).

  6. See Some of the Most Impressive Diamond Discoveries Made at ...

    www.aol.com/see-most-impressive-diamond...

    Arkansas Man Finds Second-Largest Diamond Ever Found at the Park. Discovery date: Sept. 7, 2020. The diamond Kevin Kinard found on Labor Day in 2020 is the second-largest ever found in the park's ...

  7. 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 ...

  8. Placer deposit - Wikipedia

    en.wikipedia.org/wiki/Placer_deposit

    These diamonds are then weathered from the source and swept away by alluvial processes (transported by water) to a source that becomes a diamond deposit. Alluvial diamond deposits are mined after removing overburden from the top of the rich, diamond-gravel layer. Roughly 10 percent of diamonds are mined from alluvial diamond placer mines. [8]

  9. Paradox of value - Wikipedia

    en.wikipedia.org/wiki/Paradox_of_value

    In the paradox of value, it is a contradiction that it is cheaper than diamonds, despite diamonds not having such an importance to life. The paradox of value, also known as the diamond–water paradox, is the paradox that, although water is on the whole more useful in terms of survival than diamonds, diamonds command a higher price in the market.

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