Perhaps jewelry, gemstones, and precious stones could serve a purpose other than just wealth and status, such as being combined with another type of metal to serve other ends, such as armor. Of course, the armor would have to protect the wearer very well and be expensive, though.
And I\'ll just throw in a random, on-the-spot gem name that can be used to serve as a weapon and showing off. I will call it Damop. It is black and red, and gives off a slight glow. Creatures of holiness cannot touch it for long without bleeding, and yet dark creatures treasure it for its rareness and dark beauty. Usually worn as a charm against creatures of darkness.
So, what do you think of these ideas?
For each new mineral name, I think that they should be given an unique quality, to make them more unique, if only in looks and brightness.