A chemist would say that the colour comes from sulphur molecules trapped within the crystalline matrix of the stone.

These buffers are built up from a programmable crystalline matrix.

But evolved into a crystalline matrix at temperatures above 500 C.

Or something else, like a crystalline matrix?

After that it passed through a crystalline matrix.

I saw how the crystalline matrix of the Starcore was arranged, the forces in balance.

Brains became fixed crystalline matrices, through whose frozen networks the minimal signals flickered like uneasy dreams.

We are trying to develop methods of extracting those elements from the crystalline matrices.

Where there should have been nothing but silicon circuitry and crystalline matrices, there were also thick strands of living tissue.

This was eventually traced to a form of intelligent life inhabiting a crystalline matrix and possessing the power to affect mind-waves.