Rings

Although people wear some rings as mere ornaments, or as conspicuous displays of wealth, rings have symbolic functions in relation to marriage, exceptional achievement, high status or authority, membership in an organization, and the like. Rings can be made to sport insignia to be transferred in an impression in a wax seal, or outfitted with a small compartment in which to conceal things. In myth, fable, and fiction, rings are often endowed with spiritual or supernatural significance. Reference: Wikipedia

Below are some examples and price guides of rings which have mythical or astrological symbolism, including Egyptian scarab rings and celtic rings.