Hardest Gems?

SuperZambezi said:
Any gems you are having trouble finding? I know I could not find the fifth gem in the first mansion at all. I rarely look at guides, but I had to for this one.

The fifth gem ended up being in a portrait in the Entrance. You had to knock off the knight's head and shoot it at the portrait.

That gem in the first mansion was the hardest for me as well. I had to look it up in a guide in order to find it since I was stumped. I'm still missing four gems in Gloomy Mansion and will only resort to a guide when I spent too much time searching.