I find that categorizing products, especially fashion, work very well by colour group. Women not only find this convenient, as we mostly buy the colours we usually wear, but also very appealing. There is something about colour organization that interests me and attracts my attention. All warm tones together and cool tones together. For small items like these jewelry, they can be lost when merchandised by fabrication alone or by style. As I tell all my clients, when all else fails, merchandise by COLOUR!