noun🔗ShareColémaniteA white, grey or colorless mineral form of calcium borate; a principal source of boron."Geologists studying borate deposits found large amounts of colemanite, a mineral crucial for boron extraction. "Les géologues étudiant les gisements de borate ont trouvé de grandes quantités de colémanite, un minéral crucial pour l'extraction du bore.mineralgeologymaterialsubstancechemistryscienceChat with AIVocabulary GamePractice Reading