Editing Kimberlite (section)

=== Composition ===
Kimberlites are classified as ultramafic rocks due to their high [[magnesium oxide]] (MgO) content, which typically exceeds 12%, and often surpasses 15%. This high MgO concentration indicates a mantle-derived origin, rich in [[olivine]] and other magnesium-dominant minerals. Additionally, kimberlites are ultrapotassic, with a molar ratio of [[potassium oxide]] (K<sub>2</sub>O) to [[Aluminium oxide|aluminum oxide]] (Al<sub>2</sub>O<sub>3</sub>) greater than 3, suggesting significant alterations or enrichment processes in their mantle source regions.