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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. Hematite - Wikipedia

    en.wikipedia.org/wiki/Hematite

    Hematite (/ ˈ h iː m ə ˌ t aɪ t, ˈ h ɛ m ə-/), also spelled as haematite, is a common iron oxide compound with the formula, Fe 2 O 3 and is widely found in rocks and soils. [6] Hematite crystals belong to the rhombohedral lattice system which is designated the alpha polymorph of Fe 2 O 3. It has the same crystal structure as corundum ...

  4. Mineral - Wikipedia

    en.wikipedia.org/wiki/Mineral

    A generalization is that minerals with metallic or adamantine lustre tend to have higher specific gravities than those having a non-metallic to dull lustre. For example, hematite, Fe 2 O 3, has a specific gravity of 5.26 [89] while galena, PbS, has a specific gravity of 7.2–7.6, [90] which is a result of their high iron and lead content ...

  5. Here are 5 things that will get likely more expensive in 2025 ...

    www.aol.com/finance/5-things-likely-more...

    Here are 5 things that will get likely more expensive in 2025 no matter what Trump does in the White House. President-elect Donald Trump is set to take office on Jan. 20. Once he takes the reins ...

  6. Heliotrope (mineral) - Wikipedia

    en.wikipedia.org/wiki/Heliotrope_(mineral)

    The "classic" bloodstone is translucent to opaque green chalcedony and red jasper that contains inclusions of hematite. The red jasper may resemble spots of blood , hence the name bloodstone . Other colors of chalcedony may also occur in Indian bloodstone, such as white, yellow, or blue.

  7. Siderite - Wikipedia

    en.wikipedia.org/wiki/Siderite

    This makes mining the ore an expensive proposition compared to typical ironstone or haematite opencasts. [ii] The recovered ore also has drawbacks. The carbonate ore is more difficult to smelt than a haematite or other oxide ore. Driving off the carbonate as carbon dioxide requires more energy and so the ore 'kills' the blast furnace if added ...