I used these blanks to whip up a quick Hobbit door necklace. http://shop.hobbylobby.com/products/nickel-round-glass-frame-pendants-373282/
It was very easy. Just sandwiching pictures between the glass and putting it in the frame.
Since I haven't posted ten times here are the links to the pictures.
Sam's door on one side.
Hobbit door on the other.