Imperial Topaz is the original birthstone for November. However due to the rarity of finding it, and the expense of buying it, Citrine has pretty much become the accepted birthstone for November. They are very similar in color so it is hard to tell them apart. Imperial Topaz is a completely natural topaz. If I own any Imperial Topaz in my collection of loose gemstones, I have not yet found it. I would love to have one, though. With only 33 days left until Christmas, this is my gift idea for today.