Rough Iolite - 25-40 mm - 1 kg.

Quantity: 1 kilogram

Average size range: 25-40 millimeters

Iolite, more commonly known as cordierite in mineralogy, tends to be found along with metamorphic rock and granite veins. Lab-grown iolite is most commonly used in ceramics for catalytic converters, while gem-grade iolite is sometimes used as a substitute for sapphire due to its similar color.