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  2. Luminous gemstones - Wikipedia

    en.wikipedia.org/wiki/Luminous_gemstones

    The first theme is using legendary luminous gems to illuminate buildings, for navigation lights on ships, or sometimes as guiding lights for lost persons (Ball 1938: 498–500). In India, the earliest country in which fine gemstones were known, belief in luminous gems dates back some twenty-five centuries.

  3. List of fictional elements, materials, isotopes and subatomic ...

    en.wikipedia.org/wiki/List_of_fictional_elements...

    Ceratanium (ceramic titanium) is shown to be quite useful. It is sturdy yet lightweight; and Magnet Man in the comic series, says it is paramagnetic. It is thus used in multiple robots, being the key component in Mega Man'sarmor, the Metal Blades of Metal Man, Cut Man's Rolling Cutter, and Hard Man's body. Chelonium.

  4. Thorium - Wikipedia

    en.wikipedia.org/wiki/Thorium

    Thorium is a chemical element. It has the symbol Th and atomic number 90. Thorium is a weakly radioactive light silver metal which tarnishes olive gray when it is exposed to air, forming thorium dioxide; it is moderately soft and malleable and has a high melting point. Thorium is an electropositive actinide whose chemistry is dominated by the ...

  5. Uranium ore - Wikipedia

    en.wikipedia.org/wiki/Uranium_ore

    Sample of uranium ore. Uranium ore deposits are economically recoverable concentrations of uranium within Earth's crust. Uranium is one of the most common elements in Earth's crust, being 40 times more common than silver and 500 times more common than gold. [ 1] It can be found almost everywhere in rock, soil, rivers, and oceans. [ 2]

  6. Actinium - Wikipedia

    en.wikipedia.org/wiki/Actinium

    Actinium is a soft, silvery-white, [ 17][ 18] radioactive, metallic element. Its estimated shear modulus is similar to that of lead. [ 19] Owing to its strong radioactivity, actinium glows in the dark with a pale blue light, which originates from the surrounding air ionized by the emitted energetic particles. [ 20]

  7. Porphyry (geology) - Wikipedia

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

    Porphyry (geology) Porphyry ( / ˈpɔːrfəri / POR-fə-ree) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate -rich, generally aphanitic matrix or groundmass. In its non-geologic, traditional use, the term porphyry usually refers to the purple-red form of ...

  8. Komatiite - Wikipedia

    en.wikipedia.org/wiki/Komatiite

    Komatiite. Komatiite / koʊˈmɑːtiˌaɪt / is a type of ultramafic mantle -derived volcanic rock defined as having crystallised from a lava of at least 18 wt% magnesium oxide (MgO). [ 1] It is classified as a 'picritic rock'. Komatiites have low silicon, potassium and aluminium, and high to extremely high magnesium content.

  9. Chromite - Wikipedia

    en.wikipedia.org/wiki/Chromite

    Chromite. Chromite is a crystalline mineral composed primarily of iron (II) oxide and chromium (III) oxide compounds. It can be represented by the chemical formula of FeCr 2 O 4. It is an oxide mineral belonging to the spinel group. The element magnesium can substitute for iron in variable amounts as it forms a solid solution with ...