A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, closeSmall } from '@wordpress/icons';
<Icon icon={closeSmall} />
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M12 13.06l3.712 3.713 1.061-1.06L13.061 12l3.712-3.712-1.06-1.06L12 10.938 8.288 7.227l-1.061 1.06L10.939 12l-3.712 3.712 1.06 1.061L12 13.061z"></path></svg>
closeSmall – WordPress Icon Library