Recommendations for Dwarven attire and cultural significance of jewelry in beards

Hey all, I'm currently in the beginning processes of writing a fantasy novel that I intend to create into a full-fledged series in the next few years.

Before I begin working proper manuscript, I wanted to take notes of the various races/species in the setting, and their customs/attire. One of the key players in book one will be the Dwarven race and their kingdom. After watching the Hobbit trilogy, I noticed that certain characters like Thorin Oakenshield and Fili have these pieces of jewelry/beads in their hair/beards, in addition to parts of their hair being braided.

I have thought up two ideas in relation to this:

(i) I want to include jewelry similar to the ones worn by Thorin and Fili, specifically in the beards of these Dwarf characters and make them hold significance in dwarven culture; members of the royal family wearing golden beads with engravings; aristocrats/nobility have silver beads with emblems relating to their houses; great war heroes receive some sort of purple gems that are carved into beads- so on and so forth.

(ii) Braids/knots in the beards would represent age in Dwarven culture. Conjured this up as an idea after remembering that you can learn the age of a tree by studying the rings on its inside. I think a good idea would be for each braided/knotted piece of hair (beard), it would mark a decade that dwarf has lived, so perhaps the eldest of dwarfs could have 20-30 braided ends of hair/beard!

I'd love to get any sort of input on these ideas. Types of gems/goods I could use for the jewelry, what else I could add to the dwarfs for some extra flair, or even some good resources to expand on this idea. Thank you!