But occasionally diamond takes the form of pure crystals, transparent gems.

Like a pure crystal, this lattice is highly ordered.

She could not have named the metal of its forming it might even be pure crystal.

Being such pure crystal, however, it didn't look like any kind of dam.

However, a big stumbling block has been making large, pure crystals of natural proteins.

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

I can get if for you for about three pounds for the pure crystals.

They would even take almost half of the staggeringly pure crystals.

The Falorians did all their testing with extremely pure crystals.

The purpose is to grow larger, purer crystals in a weightless environment.