A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, columns } from '@wordpress/icons';
<Icon icon={columns} />
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path fill-rule="evenodd" clip-rule="evenodd" d="M15 7.5h-5v10h5v-10Zm1.5 0v10H19a.5.5 0 0 0 .5-.5V8a.5.5 0 0 0-.5-.5h-2.5ZM6 7.5h2.5v10H6a.5.5 0 0 1-.5-.5V8a.5.5 0 0 1 .5-.5ZM6 6h13a2 2 0 0 1 2 2v9a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2Z"></path></svg>
columns – WordPress Icon Library