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  2. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. ... Price [7] Year Source Notes USD/kg ...

  3. Synthetic diamond - Wikipedia

    en.wikipedia.org/wiki/Synthetic_diamond

    Around 2016, the price of synthetic diamond gemstones (e.g., 1-carat stones) began dropping "precipitously", by roughly 30% in one year, becoming clearly lower than that of mined diamond gems. [120] As of 2017, synthetic diamonds sold as jewelry were typically selling for 15–20% less than natural equivalents; the relative price was expected ...

  4. Harry Winston - Wikipedia

    en.wikipedia.org/wiki/Harry_Winston

    In 1956, it was sold to Winston as part of an $8.4 million parcel. The largest gem cut from it was a 128.25 carats (25.650 g; 0.9048 oz) pear-shaped diamond. The same year it was purchased by Stavros Niarchos, Greek shipbuilder and industrialist, whose name it currently bears. Also cut from the rough were a 27.62 carats (5.524 g; 0.1949 oz ...

  5. Jesus - Wikipedia

    en.wikipedia.org/wiki/Jesus

    Jesus The Christ Pantocrator of Saint Catherine's Monastery at Mount Sinai, 6th century AD Born c. 6 to 4 BC [a] Herodian kingdom, Roman Empire Died AD 30 or 33 (aged 33 or 38) Jerusalem, Judaea, Roman Empire Cause of death Crucifixion [b] Known for Central figure of Christianity Major prophet in Islam and in Druze Faith Manifestation of God in Baháʼí Faith Parent(s) Mary, Joseph [c] Jesus ...

  6. South Africa - Wikipedia

    en.wikipedia.org/wiki/South_Africa

    South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa.Its nine provinces are bounded to the south by 2,798 kilometres (1,739 miles) of coastline that stretches along the South Atlantic and Indian Ocean; [15] [16] [17] to the north by the neighbouring countries of Namibia, Botswana, and Zimbabwe; to the east and northeast by Mozambique and Eswatini ...

  7. Africa - Wikipedia

    en.wikipedia.org/wiki/Africa

    Africa is the world's second-largest and second-most populous continent after Asia.At about 30.3 million km 2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surface area. [9]

  8. COVID-19 - Wikipedia

    en.wikipedia.org/wiki/COVID-19

    People remain contagious for up to 20 days and can spread the virus even if they do not develop symptoms. [ 16 ] Testing methods for COVID-19 to detect the virus's nucleic acid include real-time reverse transcription polymerase chain reaction (RT‑PCR), [ 17 ] [ 18 ] transcription-mediated amplification , [ 17 ] [ 18 ] [ 19 ] and reverse ...

  9. Knoop hardness test - Wikipedia

    en.wikipedia.org/wiki/Knoop_hardness_test

    A pyramidal diamond point is pressed into the polished surface of the test material with a known (often 100 g) load, for a specified dwell time, and the resulting indentation is measured using a microscope. The geometry of this indenter is an extended pyramid with the length to width ratio being 7:1 and respective face angles are 172 degrees ...