A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, plusCircle } from '@wordpress/icons';
<Icon icon={plusCircle} />
<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="M7.404 16.596a6.5 6.5 0 1 0 9.192-9.192 6.5 6.5 0 0 0-9.192 9.192ZM6.344 6.343a8 8 0 1 0 11.313 11.314A8 8 0 0 0 6.343 6.343Zm4.906 9.407v-3h-3v-1.5h3v-3h1.5v3h3v1.5h-3v3h-1.5Z"></path></svg>
plusCircle – WordPress Icon Library