We never have perfect crystals; they are always slightly imperfect.

It also is not the third law itself, which states that in a perfect crystal when the temperature goes to zero, so does the entropy.

Several techniques can be used to grow these perfect crystals:

This statement holds true if the perfect crystal has only one state with minimum energy.

As first pointed out by Frank, perfect crystals would only grow exceedingly slowly.

His whole body was transparent, made of perfect crystal that flowed as he moved.

Now put yourself in the place of a molecule within a pure and perfect crystal, being heated by an external source.

Thus a large perfect crystal might be perfectly built one unit-cell at a time.

The notes were random, pure sound, for only perfect crystal could speak on sunlight.

This is how we know that no perfect crystal exists anywhere in the three-dimensional universe.