A small black crystal of some sort, it looked like cheap jewelry.

So the key is to produce many different, smaller crystals of ice, rather than one big block.

If they do not win, they get a small crystal to take home with them.

These small crystals will act as a "seed" for growing the larger ones.

The smaller crystal was about the size of a large grapefruit.

At the centre of the stone was a small white crystal.

So, being able to work with smaller crystals or, better yet, single molecules, would be a huge advantage.

Taking a key from around his neck he opened the box and took out a couple of small crystals.

It is usually of pale green color, and its small crystals are often very perfect in form.

Far to the east stood the golden Presence from which these small crystals had come.