Common words:
* Nutrient-rich
* Mineral-rich
* Protein-rich
* Vitamin-rich
* Fiber-rich
* Sugar-rich
* Fat-rich
* Color-rich
* Culture-rich
* History-rich
* Idea-rich
* Data-rich
Less common words:
* Carbon-rich
* Iron-rich
* Silicon-rich
* Gold-rich
* Oil-rich
* Diamond-rich
* Biodiversity-rich
* Knowledge-rich
* Experience-rich
* Time-rich
Figurative uses:
* Emotionally-rich
* Imagination-rich
* Symbol-rich
This is just a small sampling, as you can create many "-rich" words by combining them with different nouns.