He had learned some important things, like how to deal in crystal, and about the language without words.

There had been no sign of him in the crystal.

A shadow passed over the young man in the crystal.

Time to interpret what I've just seen in the crystal.

He hadn't, during those moments when they had held each other's eyes in the crystal, seemed like a spirit at all.

All three minerals may be developed in the same crystal.

I do not know yours because you never asked for it to appear in the crystal.

After it's all in the crystal, it will begin to glow.

Similar behavior has been observed in crystals made of other materials.

Thus they can be used to study effects that are difficult to observe in real crystals.