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  2. Malachite - Wikipedia

    en.wikipedia.org/wiki/Malachite

    Malachite is a copper carbonate hydroxide mineral, with the formula Cu 2 CO 3 (OH) 2.This opaque, green-banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and deep, underground spaces, where the water table and hydrothermal fluids provide the means for chemical precipitation.

  3. Pseudomalachite - Wikipedia

    en.wikipedia.org/wiki/Pseudomalachite

    Pseudomalachite is a phosphate of copper with hydroxyl, named from the Greek for "false" and "malachite", because of its similarity in appearance to the carbonate mineral malachite, Cu 2 (CO 3)(OH) 2. Both are green coloured secondary minerals found in oxidised zones of copper deposits, often associated with each other.

  4. Shattuckite - Wikipedia

    en.wikipedia.org/wiki/Shattuckite

    Shattuckite is a copper silicate hydroxide mineral with formula Cu 5 (SiO 3) 4 (OH) 2.It crystallizes in the orthorhombic – dipyramidal crystal system and usually occurs in a granular massive form and also as fibrous acicular crystals.

  5. Plancheite - Wikipedia

    en.wikipedia.org/wiki/Plancheite

    Plancheite is a chain silicate (inosilicate), with double chains of silica tetrahedra parallel to the c crystal axis. [6] It occurs as sprays of acicular or fibrous radial clusters, with fibers extended parallel to the chains, i.e. along the c crystal axis; [5] it can also form tiny tabular or platy crystals.

  6. List of minerals - Wikipedia

    en.wikipedia.org/wiki/List_of_minerals

    Minerals are distinguished by various chemical and physical properties. Differences in chemical composition and crystal structure distinguish the various species. Within a mineral species there may be variation in physical properties or minor amounts of impurities that are recognized by mineralogists or wider society as a mineral variety.

  7. Portal:Chemistry/Selected picture/13 - Wikipedia

    en.wikipedia.org/wiki/Portal:Chemistry/Selected...

    Malachite is a carbonate mineral, copper(II) carbonate hydroxide Cu 2 CO 3 (OH) 2. It crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses. Its beauty may be seen most strikingly in the Malachite Room at the Hermitage in Saint Petersburg.

  8. Langgan - Wikipedia

    en.wikipedia.org/wiki/Langgan

    This leaves malachite, This handsome green carbonate of copper has important credentials. It is often found in copper mines, and is therefore regularly at the disposal of copper- and bronze-producing peoples. It has, in certain varieties, a lovely silky luster, caused by its fibrous structure. It is soft and easily cut. It takes a good polish.

  9. Acicular (crystal habit) - Wikipedia

    en.wikipedia.org/wiki/Acicular_(crystal_habit)

    Minerals with an acicular habit include mesolite, natrolite, [2] malachite, gypsum, rutile, brochantite and bultfonteinite. Crystals of dimethyltryptamine have an acicular habit, [3] but this substance is not regarded as a mineral by the International Mineralogical Association. A acicular phase of steel is bainite.