We talk on the crystal- just long enough to let people know there's trouble here.

He shuffled over and, with everybody else, focused all of his attention on the crystal.

You want to hear more about my thoughts on crystals?

One more faltering step and he managed to put his hand on the crystal.

Kang, his eyes on the crystal, was just beginning to get the lay of the land.

On the crystal, unlike in person, he didn't have to go through long courtesies before getting to the point.

You have to create a pattern of charges, a disorder imposed on the crystal.

"How can a fungus grow on the bare crystal like that?"

A special kind of electron microscope was trained on the crystal.

She leaned forward, putting a hand on the crystal.