monticellite
/mɒntɪˈtʃɛlʌɪt/ /mɒntɪˈsɛlʌɪt/Mineralogy
noun
An orthorhombic mineral of the olivine group which is a calcium magnesium silicate and usually occurs as yellowish crystals.
Origin
Mid 19th century; earliest use found in Henry James Brooke (1771–1857), crystallographer. From the name of Teodoro Monticelli, Italian mineralogist and vulcanologist + -ite.