Usually, when the word designer is attached to an item, like 'designer jeans' or 'designer clothes,' it means that the item has been made by a well-known designer, making the item very valuable. This is because designer items cost more to produce than items that have not been created by famous designers. This is very true with regard to jewelry, as well. A piece of jewelry that has been designed by some of the most famous jewelry houses are considered more valuable, and the price tags of most of them attest to this fact.
