Ted here, in Dorset UK.
I was blessed with an aviation training, so anything to do with flight or space etc still interests me.
IF, I had your request, without any previous experience, in this space borne material, I would have to do a lot of research,
1. as to the many different types of meteorite material
2.who in the scientific world collects them.
3. where do they operate
4. and who might have some for sale.
5. a good local to you rock hound who has the diamond
slabbing cutting and polishing gear.
Thats just to start with.
1. you can do all your research on line
2 and 3,Meteors are primarily looked for and found on snow plains in Iceland, Greenland and Antartica, by official search teams or by survey staff on their days off. driving around on skidoo's.
4.The said private individual people.
the provenance is the key.
There will be lots of on offer that are not space borne,
As to material, there generally iron or nickel,silica based.
Iridium ones are rare.
the estimated 15km dia that crashed into the bay of Mexico
supposedly killing off the dinasors, area was largely composed of heavy metals and iridium. the geological record proves this.
As to protecting it in 24/7 use, wax, laquer etc are only temporary. so you need to choose one that has a high polish without any post slabbing applied tratment.
Then theres the mounting, how do you proposes this? silver? gold?
then a good chain that will take years of wear?
Cant be done on the cheap. Just my 2pence worth.
Look forward to hearing what your solution will be and how you did it.