Johillerite is a mineral with a complex chemical composition, and its spelling can be difficult to remember. The word is pronounced /dʒoʊˈhɪləraɪt/ (joh-HILL-er-ite) and consists of five syllables. The first syllable is pronounced with a "j" sound, followed by a stressed "o" and a short "i." The fourth syllable features an unstressed "er" sound, while the final syllable ends in the "ite" mineral suffix. The complex spelling and pronunciation of johillerite make it a challenge for non-experts to accurately identify or discuss.