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  2. Serpentine subgroup - Wikipedia

    en.wikipedia.org/wiki/Serpentine_subgroup

    Serpentine subgroup (part of the kaolinite-serpentine group in the category of phyllosilicates) [1] are greenish, brownish, or spotted minerals commonly found in serpentinite. They are used as a source of magnesium and asbestos , and as decorative stone. [ 5 ]

  3. Serpentinite - Wikipedia

    en.wikipedia.org/wiki/Serpentinite

    Serpentine group minerals have a Mohs hardness of 2.5 to 3.5, so serpentinite is easily carved. [26] Grades of serpentinite higher in calcite , along with the verd antique ( breccia form of serpentinite), have historically been used as decorative stones for their marble-like qualities.

  4. Connemara marble - Wikipedia

    en.wikipedia.org/wiki/Connemara_marble

    The distinct green colour of the middle slab is a result of an abundance of serpentine minerals Connemara marble ornament, Museum Building, Trinity College Dublin. Connemara marble or "Irish green" is a rare variety of green marble from Connemara, Ireland. It is used as a decoration and building material.

  5. Marble - Wikipedia

    en.wikipedia.org/wiki/Marble

    Construction marble is a stone which is composed of calcite, dolomite or serpentine that is capable of taking a polish. [20] More generally in construction , specifically the dimension stone trade, the term marble is used for any crystalline calcitic rock (and some non-calcitic rocks) useful as building stone.

  6. Serpentinization - Wikipedia

    en.wikipedia.org/wiki/Serpentinization

    The mixture of brucite and serpentine formed by Reaction 1b has the lowest silica activity in the serpentinite, so that the brucite phase is very important in understanding serpentinization. [14] However, the brucite is often blended in with the serpentine such that it is difficult to identify except with X-ray diffraction , and it is easily ...

  7. Dimension stone - Wikipedia

    en.wikipedia.org/wiki/Dimension_stone

    In addition to selecting a stone color and pattern, the suitability of its properties for the intended use must be considered. Stone being chosen for countertops or vanities should be nonabsorptive, resist stains, and be heat and impact resistant. Stone being used in tiles should be sealed in order to resist staining by spilled liquids. Stone ...

  8. Concretion - Wikipedia

    en.wikipedia.org/wiki/Concretion

    Marleka fairy stone from Stensö in Sweden Iron sulfide concretions, such as the Kansas Pop rocks, consisting of either pyrite and marcasite , are nonmagnetic. [ 79 ] On the other hand, iron sulfide concretions, which either are composed of or contain either pyrrhotite or smythite , will be magnetic to varying degrees. [ 80 ]

  9. Travertine - Wikipedia

    en.wikipedia.org/wiki/Travertine

    Travertine is a sedimentary rock formed by the chemical precipitation of calcium carbonate minerals from fresh water, [4] typically in springs, rivers, and lakes; [5] [6] that is, from surface and ground waters. [7]

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