Pronunciation: [sˈɪlɪndɹˌa͡ɪt] (IPA) 
Cylindrite is a mineral that is typically black or brassy in color. The word is spelled with a "c" instead of an "s" due to its Greek origins. The "c" represents the Greek letter kappa (k), while "s" represents sigma (s). The pronunciation of cylindrite is /ˈsɪlɪndraɪt/, with the stress on the second syllable. The vowel sound in the first syllable is pronounced as "ih" as in "sit", and the last syllable rhymes with "right."
Cylindrite is a mineral that belongs to the sulfide class and displays a distinctive cylindrical crystal habit. It is composed of a combination of various metallic elements, such as lead (Pb), antimony (Sb), tin (Sn), and other trace elements. Its chemical formula is usually described as (Pb,Sn)(Sb,Bi)₂S₆.
Cylindrite typically occurs in hydrothermal ore veins and is often associated with other sulfide minerals, such as stibnite and galena. The mineral has a dark gray to black color and a metallic luster. Its crystal structure is orthorhombic, and its crystals can be tabular or prismatic, appearing as long, cylindrical shapes. It has a distinct cleavage and a high density, making it relatively heavy.
Cylindrite's formation is associated with complex geological processes involving the deposition of metallic sulfides in high-temperature hydrothermal environments. It is often found in areas rich in tin, lead, and antimony minerals, such as Bolivia, Peru, and Cornwall, England.
Due to its unique cylindrical crystal habit and composition, cylindrite is considered a rare and valuable mineral for collectors and researchers. Its distinctive shape and metallic luster make it visually appealing, while its complex formation processes offer insights into geological history and ore formation.
The word "cylindrite" is derived from the Greek word "kylindros" which means "cylinder". The term was coined by Friedrich Stromeyer, a German chemist, in 1828 to describe a mineral that he discovered. Cylindrite is a rare lead-copper-antimony sulfosalt mineral that typically forms elongated cylindrical crystals, hence the name.
