Classic
Classic rings share many characteristics with Traditional style rings/bands, but additionally include Delicate Solitaire as well Delicate rings that have a thin shank and with side set stones.
Vintage
Vintage rings lie in the same spectrum as Art Deco and Antique styles: rings/bands will typically have a lot of hand engravings, milgrain beading, intricate metal work and possibly micro pave set diamonds.
Alternative
Alternative rings are rings made of other metals besides the traditional gold or platinum. Titanium, Stainless Steel, Cobalt Chrome, Zirconium, as well as many other new options all fall in the alternative category.