I wish that I hadn't read this sub now! It's good, really good, but I just want to grab a couple of the ideas and work them into the 30 Starships sub that's been in my to-do folder the last 3 months. Guess I'll come back to that one once this has left my grey cells.
The Akhal-Teke is a real horse breed that develops a metallic golden coat. A more fantastic version could have a coat the color of pure gold, or silver making the horse appear to be made of the precious metal.