Bridal jewelry which is inexpensive can be good to medium quality, and if it's cheap sterling silver jewelry or gold jewelry with semi precious stones or titanium bands or cubic zirconia imitation gemstones, it is likely to be good value.
A beautiful pair of chandelier cubic zirconia earrings (or teardrop earrings) for the bride can be as little as $20 or$ 30 for the most delicate and sparkling pair set into a high quality costume jewelry setting, perhaps silver or other metal. They will not fall apart quickly, although eventually they will lose their shine. But for one day or two days or a special occasion they are more than adequate.
Cheap jewelry online is often a way to save money but may also be a great time saver because shopping for jewelry in a shop makes you feel pressured and the last thing you need is to choose a set of bridal accessories or cheap jewels for your wedding because a salesperson was pushy. Online you can shop comfortably at your pace and without any sales stress. The prices are often lower due to the absence of overhead to maintain a fancy bridal shop, and these savings are reflected in the prices you pay.