A mineral that exhibits or can exist in two different crystalline forms.
From Greek 'di-' (two) plus 'morph' (form) plus '-ite' (mineral suffix, from Greek 'lithos' meaning stone). The term specifically describes minerals showing polymorphism.
Dimorphite is the mineralogist's way of saying 'this rock can be two different things'—like how carbon can be either graphite or diamond, completely different minerals with identical chemical formulas, which was absolutely mind-blowing when first discovered.
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