Travertine (sedimentary rock)

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See the whole collection of Ornamental Stones Locality: Naslavcea, Moldova No.: 2123 Size: 8 x 6 x 0.7 cm Type: Sedimentary rock Description: Travertine is composed chiefly of Calcite; fine-scale banding of browns, grays, whites, and pink of very fine-grained to no visible crystals of Calcite. Travertine is the classic construction stone, for facing and paving. Calcareous alabaster is used in polished slabs and as ornamental objects. Essential minerals: Calcite or Aragonite, with Limonite impurities. Non-essential minerals: sometimes none :), but frequent fossils and imprints, especially of plants. Impurities such as iron oxides may stain it red or brown. A minor amount of clays may be present. Website: http://geology.uaic.ro/muzee/mineralogie/ Concept & 3D-modelling by dr. Andrei Ionut APOPEI