It is hard to tell the difference between real and fake sapphires and rubies. The fake ones look identical to real ones, but cost just a fraction. Don’t spring for a supposedly natural sapphire until you have it check for “natural inclusions” by a gemologist with a good reputation.
If you are interested in collecting costume jewelry, be sure to stay conscious of the condition. A piece that isn’t in very good condition won’t be worth it, and since you may be thinking of an expensive item as an investment, it’s important to watch for wear and tear. A piece that is in excellent condition will increase in value. If your dream wedding band is not in the budget, consider buying smaller and upgrading later. You could also make a plan to receive an upgraded diamond ring on your wedding anniversary, or another momentous occasion. Furthermore, you may be able to take advantage of a jewelry buy-back program that allows you to trade in your old band for an upgrade.