The composition of sand is dependent on the geographical area where the sand is located. Most sands are composed of small land sediment particles, minerals, rocks and organic matter that has been eroded and ground down over many years. For this reason, sand composition varies greatly.
Sand occurs naturally and is mostly composed of rock and mineral particles that have been broken down to a fine consistency. Different sand types around the world are defined by their size, coarseness and texture. The composition of sand differs depending on the types of rocks and minerals found in the area. The most common type of sand is silica sand, which is rich in silicon dioxide. The second most common type is calcium-carbonate sand which is rich in calcium and forms from organic matter such as coral and shellfish.