Okay, armour created from Ivory is not too far-fetched - lacquered wood and boiled leather both make reasonable armours. I could see alchemists involved in the preparation of the substance but not in the actual construction of the armour.
Apart from Moons comment on Ivory being bone (its not, similar, but different) his comments are spot on.
Real World: some Indians in the Amazon treat their eyes with a traditional potion applied with palm leaves. Brutally painful, the drug alters vision, giving the jungle's dense green walls greater texture and dimension. You could adapt this to desert or swamps, or other hard to navigate regions.