1. to convert into or impregnate with pyrite (iron sulfide mineral)
Usage: chiefly British spelling; American spelling is 'pyritize'; technical term used in geology and mineralogy

Examples

• The sedimentary rocks were pyritised over millions of years through chemical processes.
• Organic material in the fossil became pyritised, preserving fine details of the organism.
• Hydrothermal fluids can pyritise surrounding host rocks near mineral deposits.
• The pyritised fossils showed remarkable preservation of microscopic structures.