Cesanite is a mineral with the chemical formula Ca2ScAl2SiO7(OH)2. The correct pronunciation of Cesanite is /sɛsənaɪt/ (seh-suh-nyt), with emphasis on the first syllable. The word is written with the letter "c" at the beginning, followed by "es" to represent the sound /s/. The rest of the word is spelled according to the usual rules of English spelling. Cesanite is a rare mineral, first discovered in the 20th century in Madagascar, and is primarily used for research purposes.
Cesanite is a noun that refers to a rare, crystalline mineral primarily composed of lead, copper, and arsenic sulfides. It belongs to the monoclinic crystal system and typically occurs in the form of elongated, prismatic crystals. Cesanite derives its name from its discovery locality, the Cesano Valley in Italy.
This mineral typically exhibits a grayish-black color with a bright metallic luster. It can occasionally display iridescent colors due to its surface oxidation. Cesanite has a high density and a relatively high hardness, making it resistant to scratching. It possesses a brittle and uneven fracture and is not known for being translucent or transparent.
Chemically, cesanite is composed of a complex mixture of elements, mainly consisting of lead, copper, and arsenic sulfides. It often occurs in association with other minerals like chalcopyrite and sphalerite.
Cesanite is primarily sought by mineral collectors and enthusiasts due to its rarity and attractive crystal habit. Its distinct color and metallic luster make it visually appealing. However, cesanite is not used for any practical or industrial purposes due to its scarcity and relatively low abundance. Its chemical composition, particularly the presence of toxic elements like lead and arsenic, also limits its potential applications. Consequently, cesanite remains a valuable and intriguing mineral specimen mainly found in private collections and geological museums.