Solid silver or sterling silver often accent designer eyeglass frames but don't make up the whole eyeglass frame enchilada since silver is not comfortable. All that glitters is gold, that is, gold plating, when it comes to gold eyeglasses frames.
Wood and bone, while less adjustable than other eyeglasses frame materials, look fashionable. Calabria 798 eyeglass frames have distinctive wooden temples.
A crystal designer eyeglass frame, sometimes set with precious or semiprecious stones, may drive up the price but befits a black tie or other dressy occasion.