Nephite Breastplate

I got the idea from the breastplate really from 2 sources. The first source was an image from an aztec warrior in full regalia. He had what was called a pectorial, I think. It was about 4 inches wide and about 12-14 inches long. It was worn around the neck. There is also a mound builders breast plate made of copper that is much larger. Having built armor and done some back yard sword fighting the first one seems like it was merely ornamental. Not to mention when fightinting it would most likely bounce up and hit you in the face than protecting anything. Mine is a rectangle shape with a cord to wear it around the neck and 2 belts that strap behind the back to help secure it. I believe that like all the armor it is made with leather and either copper or brass. I just think that iron and steel would be saved more for tools and weapons rather than armor. Although bronze might be possible. Alma 43:44 says "many of the Nephites were slain by their hands, (the Lamanites) yea, for they did smite in two  many of their head-plates, and they did pierce many of their (the Nephites) breast plates." this passage makes me think that the head plates and breast plates were not made from iron or steal. iron and steal are very difficult to split and pierce. So it is my thaught that the materials used in the armors was cloth, leather, Copper, and Brass. They could have also used bronze. Because these mettles can be split or pierced.