It uses special gases or crystals to make the light with only a single colour.

Only crystal will pay up on the diagnosis, and make it possible.

All those crystals working together make ice look sparkly.

His fingers found the hard lumps the crystals made in the wool.

Now the crystal is pure and made of only the compound.

The crystal made an icy clear musical note when I touched it to the rim of her glass.

Thin crystal, for example, makes a wine taste better than thick ordinary glass.

"When is anything ever as good as the crystal makes it sound?"

Unlike every other picture that the crystals had made, this one was not followed by any other bright vision.

The one thought that came crystal clear as we made ready to leave, though, was one I would rather not have had.