Jewelry in the Middle East is not only used as personal adornment, but often carries a deeper meaning as well. Certain jewelry items feature often as amulet or talisman. The colours and/or materials used attribute the jewelry item with special powers. In addition, certain types of jewelry were constructed with the sole purpose to protect the wearer and are therefore to be regarded as an amulet proper. One of the most intriguing categories consists of magical squares. These are a type of number amulets, in which the numbers are carefully arranged in order for each row, column and full diagonal to produce the same sum. Ideally, the square contains each number only once, but in some cases a repetition of the same number occurs. In the Islamic world, these squares are known as waqf or aqwaf in the plural.