Are you ready for the most detailed look at Street Fighter X Tekken's gem system yet? Capcom-Unity has a post detailing all of the standard gems in SFxT (pictured below) and listing all of the pre-order gems available from various retailers. There's also a new episode of "X the Line" in which Andrea Rene and Capcom Senior Product Manager Matt Dahlgren demonstrate a bunch of gems and their activation conditions. An interesting revelation is that Assist Gems are active at all times and have drawbacks. Having a significant handicap for assist gems might alleviate concerns that the gems would be overpowered.
Now that we actually have solid information about gems, what do you think of them?