The new South Sudan flag keeps the green, with its connection to the Arab world, and the red, white and black and adds blue and gold to set itself apart. In my searching for information, I was reminded of grade school projects that required the memorizing of flags.
Ceramic tile is made from natural clay, sand and water. These materials are molded to form square or rectangular tiles and then baked in a kiln to remove most of the moisture. Porcelain tile is also made from clay but tends to be made using denser types of clay than ceramic.
Terracotta has been used as a building material for centuries. Terracotta is a popular material for planters. Ceramic roofing shingles can last for over a 100 years.non3570 - Terracotta is a type of clay. So terra cotta tiles are a subset of clay tiles. Actually terracotta tiles are ceramic tiles which are tiles made of red or terracotta clay. Porcelain tiles are tiles made from light colored clay (like white, grey, or light brown clay).