Some gems are made from the biological processes of animals or plants. These can become from the dead or living part of a marine organism or tree gum. It can be found also in materials like a dinosaur bone. Such gems are called organic gems. Some of these gems are obtained by farming nowadays, such as Pearls.
After getting their ornaments are made by cutting them, or decorative items are made from them. Some of the main organic gemstones are listed as follows.
2. Natural Pearl
6. Tortoise Shell
Coral is an organic gemstone formed as a branch-like calcareous framework by a microscopic marine organism known as the coral polyp. It is formed by the accretion of colonies of these tiny marine animals. The two main species are the Corallium rubrum and Corallium nobile.
Pearls formed inside a pearl oyster due to the concentric deposition of nacreous layers. Pearls are classified into two basic categories – Natural and Cultured. The term ‘synthetic’ must not be used with respect to pearls. Materials that simulate or look like pearls, but do not have composition or structure, are known as imitation pearls.
Amber is the gum of a tree that dries and hardens over time. It is so hard and shiny that it is carved and used as gemstone. Small parts of trees, plants, vegetation and insects, moths, mosquitoes, etc. can be seen very commonly in it.
Ivory is basically dentine which is the material that makes up the teeth of all mammals. From a commercial point of view, ivory can be the tusk of an elephant, walrus, narwhal, or the teeth of a hippopotamus. It is the elephant tusk that is the most valuable.
Jet is a type of coal-derived from wood that is transformed into gems due to extreme pressure and heat. It is a dark brown or black colored gemstone with a metallic sheen. Sometime it may mix with pyrite gemstone.
As the name suggests, we get it from the turtles. The shell of certain species of tortoise is used as a gemstone in jewelry. It is with yellow and brown spots, sometimes it also has white spots.