All seed crystal rods or plates must be the same length as the crystal you wish to grow

Hi there. I caught a technical error in your video. The seed crystals for quartz crystals are not the little chip you pointed to. That is just a chip in the crystal. 

Comparison of the chemical structures of (a) an amorphous solid made of silicon dioxide – glass – and (b) a crystal of silicon dioxide – quartz.

The seed is actually a long thin rod that runs down the entire length of the crystal. Look carefully and you should be able to see it. All seed crystal rods or plates must be the same length as the crystal you wish to grow.