If you have 2 malachite gems, you might want to email a save in to support@larian.com (DKS
support page), with a description of the problem and maybe a link to this post. That may help them figure out what the problem is, and they may be able to reset whatever is not getting triggered.
If the gems are in your inventory, maybe try sending them to the battle tower and try again, and if that doesn't help, return to the tower and move them back to your inventory for another try (that process may get them recognized).
Keara's statue names (D2:ED topic, but AFAIK the puzzle is the same in DKS)
Welcome to the forum.
See Lar's post
here on how to send them an Xbox save.
With the PC version, in XP the saves are in the folder
C:\Documents and Settings\ %username% \Local Settings\Application Data\Divinity 2\Savegames
or in Vista / Win 7
C:\Users\ %username% \AppData\Local\Divinity 2\Savegames
You may need to set Windows Explorer to show hidden files and folders (
XP, Vista,
Win 7).