A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, postCategories } from '@wordpress/icons';
<Icon icon={postCategories} />
<svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false"><path d="M20 4H4v1.5h16V4zm-2 9h-3c-1.1 0-2 .9-2 2v3c0 1.1.9 2 2 2h3c1.1 0 2-.9 2-2v-3c0-1.1-.9-2-2-2zm.5 5c0 .3-.2.5-.5.5h-3c-.3 0-.5-.2-.5-.5v-3c0-.3.2-.5.5-.5h3c.3 0 .5.2.5.5v3zM4 9.5h9V8H4v1.5zM9 13H6c-1.1 0-2 .9-2 2v3c0 1.1.9 2 2 2h3c1.1 0 2-.9 2-2v-3c0-1.1-.9-2-2-2zm.5 5c0 .3-.2.5-.5.5H6c-.3 0-.5-.2-.5-.5v-3c0-.3.2-.5.5-.5h3c.3 0 .5.2.5.5v3z" fill-rule="evenodd" clip-rule="evenodd"></path></svg>
postCategories – WordPress Icon Library