Amorphous

Amorphous solids are materials whose atoms or molecules lack a long-range ordered structure, unlike crystalline solids. Glass is a common example of an amorphous solid. Although it appears similar to quartz, glass differs at the molecular level, lacking the repeating three-dimensional patterns found in crystalline structures.

In what way does glass differ from quartz at the molecular level?

What is meant by 'no repeating 3 dimensional patterns' in the context of amorphous solids?