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  2. Lamproite - Wikipedia

    en.wikipedia.org/wiki/Lamproite

    Research at Argyle diamond have shown that most stones are of E-type; they originate from eclogite source rocks and were formed under high temperature ~1,400 °C (2,600 °F). The Argyle diamond mine is the main source of rare pink diamonds. Olivine lamproite pyroclastic rocks and dikes are sometimes hosts for diamonds.

  3. Volcanic pipe - Wikipedia

    en.wikipedia.org/wiki/Volcanic_pipe

    Over time, the tuff ring may erode back into the bowl, leveling out the depression by filling it with washed-back ejecta. Kimberlite pipes are the source of most of the world's commercial diamond production, and also contain other precious gemstones and semi-precious stones, such as garnets , spinels , and peridot .

  4. Rock (geology) - Wikipedia

    en.wikipedia.org/wiki/Rock_(geology)

    Materials recovered by mining include base metals, precious metals, iron, uranium, coal, diamonds, limestone, oil shale, rock salt, potash, construction aggregate and dimension stone. Mining is required to obtain any material that cannot be grown through agricultural processes, or created artificially in a laboratory or factory .

  5. 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.

  6. Tuff - Wikipedia

    en.wikipedia.org/wiki/Tuff

    Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. [1] [2] Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as tuffaceous (for example, tuffaceous sandstone). [3]

  7. 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 ]

  8. Rams-Eagles preview: Rams look to knock off another top NFC ...

    www.aol.com/sports/rams-eagles-preview-rams-look...

    How to watch Rams at Eagles. This game will be broadcast on NBC and streamed on Peacock. Betting odds. The Eagles are a 6-point favorite at BetMGM.The total for the game is 44.

  9. Opus reticulatum - Wikipedia

    en.wikipedia.org/wiki/Opus_reticulatum

    Opus reticulatum (also known as reticulate work) is a facing used for concrete walls in Roman architecture from about the first century BCE to the early first century CE. [1]: 136–9 [notes 1] They were built using small pyramid shaped tuff, a volcanic stone embedded into a concrete core.