The month of November is represented by two richly colored gemstones: topaz and citrine. The gemstones look similar, in fact, that they’ve often been mistaken for one another throughout history. But they are actually unrelated minerals, and topaz occurs in a wide variety of colors far beyond yellow. The good news is that both of these November birthstones are fairly abundant and affordably priced, which means anyone can find a topaz or citrine that will fit their budget. Topaz Once upon a time, all gems that were yellow were once considered topaz, and all topaz were presumed to be yellow.