The correct spelling of malacholite is "malachite". This word refers to a bright green mineral that is commonly used in jewelry and decorative items. The pronunciation of this word is /ˈmæləkaɪt/, with the stress on the second syllable. The "ch" sound is pronounced as a hard "k" sound, which is common in Greek-derived words. The final "e" is silent, as is often the case in English words of French origin.
A mineral, a variety of angite of various shades of green, and of a vitreous or sub-pearly lustre.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.