They have characteristic club-shaped peaks rising from their surface, which create an image reminiscent of a solar corona under an electron microscope, hence their name.
Zina tabia ya ncha kali zenye umbo la rungu ambazo huchomoza kutoka kwa maeneo yake, ambazo katika picha za kitaalamu za elektroni huunda picha inayofanana na korona ya jua ambapo jina ilitoka.