Line - WikipediaLine is a sedimentary rock, composed mainly of skeletal fragments of marine organisms such as coral, forams and molluscs. Its major materials are the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO3). About 10% of sedimentary rocks are lines. The solubility of.lime stone,lime stone,Line: The Calcium Carbonate Chemical Sedimentary RockProducts made with line: Line is an essential mineral commodity of national importance. Some of the many products made using line are shown in this photograph: breakfast cereal, paint, calcium supplement pills, a marble tabletop, antacid tablets, high-quality paper, white roofing granules, and Portland.lime stone,Line CollegeLine College is an accredited, independent, liberal arts college located in Gaffney, South Carolina with extended campus locations in Charleston, Columbia, Greenville, Florence, Aiken, Kingstree and the Lowcountry for working adults wishing to complete a degree.