A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, megaphone } from '@wordpress/icons';
<Icon icon={megaphone} />
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path fill-rule="evenodd" d="M6.863 13.644L5 13.25h-.5a.5.5 0 01-.5-.5v-3a.5.5 0 01.5-.5H5L18 6.5h2V16h-2l-3.854-.815.026.008a3.75 3.75 0 01-7.31-1.549zm1.477.313a2.251 2.251 0 004.356.921l-4.356-.921zm-2.84-3.28L18.157 8h.343v6.5h-.343L5.5 11.823v-1.146z" clip-rule="evenodd"></path></svg>
megaphone – WordPress Icon Library