The patch tomorrow is adding 3 new meta gems along with reverting the change of the requirement to the Chaotic metas.
Agile Shadowspirit Diamond:+54 Agility, +3% Critical Damage
Burning Shadowspirit Diamond: +54 Intellect, +3% Critical Damage
Reverberating Shadowspirit Diamond: +54 Strength, + 3% Critical Damage
The requirements for these 3 gems, along with the Chaotic Shadowspirit Diamond are being changed to what they were before the 4.0 patch. They will now require 3 Red Gems as opposed to requires more Blue than Red Gems.
For some classes (Elemental Shaman for instance) it has been worthwhile to fill that requirement for the meta, therefor a lot of people aren't using Red gems in their gear right now.
So with tomorrow's patch, uncut Shadowspirit Diamonds (for the new cuts that people will have to find) and cut Brilliant/Delicate/Bold Inferno Rubies should see a jump in price.
Sorry if this is common sense for some people, but its something I was thinking about when posting my auctions today.