The word "Periclasite" is spelled as [ˈpɛrɪkləsaɪt]. The first syllable is pronounced as "peri" with the stress on the first syllable, followed by "kla" and "site". The "i" in "kla" and "site" is pronounced like the letter "i" in the English alphabet. "Periclasite" is a mineral that contains magnesium, iron, and oxygen. It is often found in metamorphic rocks and is commonly used in the production of refractory bricks used in high-temperature industrial settings.