quartz crystal

The next day they found the quartz crystals in place.

"At least we now have something to cut those quartz crystals with."

"Did you ever see so many quartz crystals in your life?"

The faces of this form are common on quartz crystals.

This kind of filter is often made from quartz crystals.

The amount of vibrations from a quartz crystal per second does not change.

Quartz crystals offer good stability and are often used for this purpose.

"This is the largest rose quartz crystal I've ever seen," he said.

By the 1930s, the electronics industry had become dependent on quartz crystals.

After the war, many laboratories attempted to grow large quartz crystals.