pholidolite
/fə(ʊ)ˈlɪdəlʌɪt/Mineralogy rare
noun
A mineral said to consist of an aluminosilicate of iron, magnesium, and potassium, occurring as minute scales.
Origin
Late 19th century; earliest use found in American Journal of Science. From ancient Greek ϕολιδ-, ϕολίς scale + -o- + -lite, after Swedish folidolit.