Tellinite is a mineral that belongs to the organic compound group, specifically the resinite subgroup. It is a rare and distinctive mineral formed from the transformation of plant material during the geological process of coalification. The mineral is typically found in coal deposits and is characterized by its black or dark brown color, often with a resin-like appearance.
Tellinite has a non-metallic luster and can exhibit a vitreous or waxy sheen. It has a relatively low hardness, typically ranging from 2 to 2.5 on the Mohs scale, making it relatively soft. Its specific gravity often ranges from 1.20 to 1.40, indicating its relatively low density.
Under microscopic or specialized analysis, tellinite can exhibit a characteristic conchoidal fracture and can be identified by its fluorescence under ultraviolet light. It is primarily composed of carbon and hydrogen, with trace amounts of other elements.
Tellinite is often associated with other organic minerals in coal deposits, such as vitrain and clarain. It is believed to have formed millions of years ago during the geological transformation of plant matter into coal. Due to its rarity and organic origin, tellinite is considered a collector's mineral and can be found in collections of mineral enthusiasts and museums.
In summary, tellinite is a rare organic mineral found in coal deposits, characterized by its black or dark brown resin-like appearance. It has a low hardness, conchoidal fracture, and displays fluorescence under ultraviolet light.
