Communication with crystals may not necessarily happen in words. It could happen with images, emotions, intuitions or a combination. If you can open your heart chakra* and transfer streamers of energy outside your body to your belly button (2nd chakra) and 3rd eye you may make a space for the crystals and you to exchange feelings/ideas.

* a good way to open you heart chakra is through the "I-Am" exercise. Do you know it?