A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, caption } from '@wordpress/icons';
<Icon icon={caption} />
<svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false"><path fill-rule="evenodd" clip-rule="evenodd" d="M6 5.5h12a.5.5 0 0 1 .5.5v12a.5.5 0 0 1-.5.5H6a.5.5 0 0 1-.5-.5V6a.5.5 0 0 1 .5-.5ZM4 6a2 2 0 0 1 2-2h12a2 2 0 0 1 2 2v12a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6Zm4 10h2v-1.5H8V16Zm5 0h-2v-1.5h2V16Zm1 0h2v-1.5h-2V16Z"></path></svg>
caption – WordPress Icon Library