Mother-of-Pearl
Mother-of-pearl is found on the shells of mollusks, such as mussels and oysters, and the shells of pseudopods, such as snails. When the young of these creatures come into the world, they create a shell "house" in order to preserve their existence. The walls of this housing are formed with layers of their secretions, ensuring a simultaneous growth of house and creature together.

Depending on the type of animal and the environment in which it lives, secretions create various shapes and colors found on the different types of mother-of-pearl. White mother-of-pearl comes from pearl-bearing oysters. It features high reflective properties and is one of the most commonly used types of this material. Iridescent mother-of-pearl is a type in which the colors of pink and green are predominant, while variegated mother-of-pearl is a multicolored type. Stone mother-of-pearl is white with a low reflective power, while mat mother-of-pearl is dull grey and also has a low reflective power.

The shiny quality of mother-of-pearl has attracted attention for thousands of years. The Louvre Museum features mother-of-pearl objects that belonged to the Sumerians and were found in Mesopotamia. In China, a dish with geometric-shaped pieces of mother-of-pearl was found that belonged to the Tang Dynasty in 618-906 A.D. Mother-of-pearl work was also common in ancient Italy, Greece and Cyprus. Today, different types of mother-of-pearl are commonly used in the art world. This type of art is certainly a challenge, for in order for them to be made into works of art, the mother-of-pearl pieces must be thick enough to withstand being worked upon and be of high enough quality to beautifully reflect colors of the rainbow.