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  2. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    As of 2020, the most expensive non-synthetic element by both mass and volume is rhodium. It is followed by caesium, iridium and palladium by mass and iridium, gold and platinum by volume. Carbon in the form of diamond can be more expensive than rhodium. Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars.

  3. Californium - Wikipedia

    en.wikipedia.org/wiki/Californium

    Californium is a silvery-white actinide metal [12] with a melting point of 900 ± 30 °C (1,650 ± 50 °F) and an estimated boiling point of 1,743 K (1,470 °C; 2,680 °F). [13] The pure metal is malleable and is easily cut with a knife. Californium metal starts to vaporize above 300 °C (570 °F) when exposed to a vacuum. [14]

  4. Gold in early Philippine history - Wikipedia

    en.wikipedia.org/wiki/Gold_in_early_Philippine...

    Burial goods found in graves from early Philippine history includes various beads earrings rings pendants, combs, strips, and other ornaments. [3]: 309 Another gold feature commonly discovered in elite burials from early historic Philippines are death mask artifacts, meant to cover either part or all of the deceased's face in the grave [18]

  5. File:Gold Spot Price per Gram from Jan 1971 to Jan 2012.svg

    en.wikipedia.org/wiki/File:Gold_Spot_Price_per...

    English: This chart shows the nominal price of gold along with the price in 1971 and 2011 dollars (adjusted based on the consumer price index). The historical gold price was obtained from www.igolder.com; CPI was obtained from www.rateinflation.com. The data is in section Chart Data.

  6. Californium compounds - Wikipedia

    en.wikipedia.org/wiki/Californium_compounds

    The only californium ion that is stable in aqueous solutions is the californium(III) cation. [2] The other two oxidation states are IV (strong oxidizing agents) and II (strong reducing agents). [3] The element forms a water-soluble chloride, nitrate, perchlorate, and sulfate and is precipitated as a fluoride, oxalate or hydroxide. [4]

  7. Coins of the Philippine peso - Wikipedia

    en.wikipedia.org/wiki/Coins_of_the_Philippine_peso

    In gold: 1, 2, 4 pesos; the 4 pesos weighing 6.766 grams of 0.875 fine gold In silver: 10, 20, 50 centimos; the 50 centimos weighing 12.98 grams of 0.9 fine silver (fineness reduced to 0.835 in 1881) The dearth of pre-1857 copper coins were addressed by counterfeit two-cuarto coins (worth 1/80th of a peso) made by Igorot copper miners in the ...

  8. History of Philippine money - Wikipedia

    en.wikipedia.org/wiki/History_of_Philippine_money

    In order to remedy this damage in the monetary situation, Queen Isabella II issued a decree in 1857 ordering the founding of the Casa de Moneda de Manila in the Philippines in order to coin gold 1-, 2- and 4-peso coins according to Spanish standards (the 4-peso coin being 6.766 grams (0.2387 oz) of 0.875 gold).

  9. Gold in California - Wikipedia

    en.wikipedia.org/wiki/Gold_in_California

    Only gold that is concentrated can be economically recovered. Some 400 million years ago, rocks that would be accreted onto western North America to build California lay at the bottom of a large sea. Subsea volcanoes deposited lava and minerals (including gold) onto the sea floor; sometimes enough that islands were created. [1]