Doorway Gemstones are now known as Doorway Crystals and have a slightly different description. This is a storyline consistency change, and has nothing to do with any new functionality. Role-playing-wise, you should pretend that they have always been called Doorway Crystals instead of Doorway Gemstones. The descriptions for Invasion Ingots and Weapon Primitives have changed slightly as well, although their names remain the same.
As a storyline is developed slowly over years and things are added in, sometimes small changes are needed for older parts of the story to match up with new concepts and themes. That is all this is.