Don't go for 'Genuine leather'. Full grain at least. Even better, go for bridle leather or harness leather. These are leathers made for horse riding so they are very strong and long lasting even when used outdoors.

My faves that I have bought are from Narragansett Leather and Leather Goods Connection. About RM2xx.

The buckle or the leather? Buckle yes, they have nickel plated brass and solid brass.

Leather, I have not seen any bridle leather that shines. My black harness leather belt is a bit shiny. My light brown is not.

Most good leathers are not shiny unless polished. Instead, they are lustrous.

we share share buy full grain leather..

if you wan to DIY can be even cheaper for a full grain one ..

Please don't take this the wrong way but I think you have become used to seeing people in the office use belts made from cheap corrected grain leather. That's just bling dude. Go for quality.