fidindan
Fidindan is a rare and unique mineral discovered in the late 20th century. It is primarily found in the volcanic regions of Iceland and the Philippines. The mineral is characterized by its vibrant green color, which is due to the presence of copper and other trace elements. Fidindan has a hardness of 5.5 on the Mohs scale, making it relatively soft compared to other minerals. Its crystal structure is monoclinic, and it typically forms in small, prismatic crystals or as granular masses.
Fidindan's chemical composition is complex, consisting mainly of silicon, oxygen, and various metal ions such as
Despite its rarity and unique properties, fidindan has not yet been extensively studied due to its limited