malacolite
/ˈmaləkə(ʊ)lʌɪt/Mineralogy
noun
A mineral now usually regarded as identical with diopside.
- Malacolite has sometimes been differentiated from typical diopside on the basis of colour or physical properties..
Origin
Early 19th century; earliest use found in Arthur Aikin (1773–1854), natural scientist and author. From French malacolithe from malaco- + -lithe.