Gemstone jewelry is basically all your birthstones. There are precious stones which are rubies, emeralds and sapphires. They are called that because they are all almost as hard as diamonds. So, basically they are guaranteed under warranties because they won't break as easily as the semi-precious stones which are all the other birthstones. The most rare gemstones would be tanzanite. You see a lot of it right now since they just discovered that stone, within the last 10 years. So, they have been selling that and it's not a cheap gemstone because it's naturally mined. Everything what I am talking is naturally mined. In the next 10-15 years, the whole supply will be gone and that's when the price is going to sky rocket.
