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.
It is unusual to have black vanes inside this type of marble. Chinas-Marbles made of china or porcelain clay. There are both glazed and unglazed chinas. Clearies-Clear glass marbles made of a transparent single color throughout.arbles have been made of all kinds of materials throughout history. At first they may have been simple round stones or clay balls. More recently they have been made of actual marble, clay, porcelain, glass and steel. The process for making marbles has changed over the years as new materials and technologies spread.