Here's an easy way to make a diamond shape bookmark. It only takes a few seconds to make and will have those flaps in the back. Hope you enjoy making it.:)
Step 1: Materials
These are the things you will need:
3x5 cards or regular paper
glue or tape or something sticky
pencil (to decorate it)
Color pencil or crayon or marker (also to decorate, I prefer color pencil)
Step 2: Folding
Now you will take your paper and fold the corner down to create a square. Cut out the square.
Step 3: More Folding
Then you will fold the corners inwards. After that you glue the folds down.
Step 4: The Last Fold
The last fold is when you hold the square like a rhombus and fold the tip inwards but don't glue or tape it down. It will be the flap.
Step 5: Decorating (optional)
If you want to then you can color the diamond and add the lines that make it it more look more like a diamond. But color it first so it will be easier to draw the lines.