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  2. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    Lower ranks of coal can be less expensive, for example sub-bituminous coal can cost around US$0.038/kg carbon. [19] Graphite flakes can cost around US$0.9/kg carbon. [ 20 ] Price of synthetic industrial diamond for grinding and polishing can range from 1200 to 13 300 USD/kg, while cost per weight of large synthetic diamonds for industrial ...

  3. From Seagull Poop to Plutonium: The Most Valuable ... - AOL

    www.aol.com/gold-caviar-most-valuable-substances...

    Cost: $5 per gram and up. ... Cost: $27.10 per gram. Platinum is a beautiful precious metal that is in a similar category as gold and silver. All three of these metals are frequently traded in the ...

  4. 18 Most Expensive Gemstones in the World - AOL

    www.aol.com/18-most-expensive-gemstones-world...

    18. Platinum. Cost: $33.02 per gram Platinum is a beautiful precious metal that is in a similar category as gold and silver. All three of these metals are frequently traded in the global markets ...

  5. Platinum, Gold and More of the Most Valuable Substances in ...

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  6. Platinum coin - Wikipedia

    en.wikipedia.org/wiki/Platinum_coin

    The coin had a face value of 100 Estonian kroons, a platinum purity of 999/1000, a weight of 7.775 grams, [14] and a diameter of 18.0 mm. [15] The coin was designed by Tiit Jϋrna and produced by the Mint of Finland with a quantity of 3,000 pieces.

  7. Platinum - Wikipedia

    en.wikipedia.org/wiki/Platinum

    Platinum is a chemical element; it has symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name originates from Spanish platina, a diminutive of plata "silver". [7] [8] Platinum is a member of the platinum group of elements and group 10 of the periodic table of ...

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