Such is the story of an Arkansas man who drank so much iced tea that it led him to develop kidney failure. Three Arkansas doctors described the case in a letter published by the New England Journal of Medicine this week.
What is Marble? Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism. It is composed primarily of the mineral calcite (CaCO3) and usually contains other minerals, such as clay minerals, micas, quartz, pyrite, iron oxides, and graphite.
Although both are stones and both are quarried from the earth, granite and marble (and marbles relatives  limestone, onyx and travertine) are very different from each other. Granite is formed deep in the earths mantle at extremely high temperatures, and is a very hard, resistant stone made of crystallized minerals.