How to wear pendants correctly?

I want to ask a question about suspensions. How do you wear them properly? Are there any rules about it or do all people wear them as they feel more comfortable?

Each of the real gold pendants has its own symbolism and unspoken rules of wearing. For example, decorative pendants suggest splendor of forms and a wide variety of decor. While religious and protective models welcome ascetic conciseness and simplicity of forms.