In Harry Potter and the Chamber of Secrets, the diary of Tom Marvolo Riddle (soon to become Lord Voldemort), unknowingly a Horcrux, was given to Ginny Weasley. This very diary proved to be the cause of several deadly events, which eventually led to Harry stabbing the diary with a basilisk fang, therefore destroying the Horcrux.

Here, I was fiddling with some ideas and the idea of a Tom Riddle diary necklace began to develop.
The diary and the basilisk fang are almost entirely made out of paper.
I put a lot of effort in this so I hope you like it and make it yourself!
Feel free to ask questions! I'd be happy to clarify any steps.

Step 1: Supplies!

This is a rather long list but they're all easily found items!

For the diary:
- one piece of 8.5" by 11" printer paper (you'll actually only use 3/4 of it)
- a tea bag (type doesn't matter; I used green tea)
- thick paper (like from a watercolor sketchbook)
- black fabric/paper; it doesn't really matter what's on the inside of the cover
- black paint
- aluminum foil
- 2 jump rings
- piece of necklace chain
- leather or suede cord + bead (more on that later)

For the basilisk fang:
- one long strip of sketchbook paper (thick paper) about 12 inches or 30.5 cm
- strips of paper (I used notebook paper) for the paper mache
- white paint
- eye pin
- clear nail polish (or type of varnish)

Tools
- a flat surface that you don't mind getting paint, water, glue, etc on
- scissors
- glue
- a smidge of tape
- envelope cutter (or other preferred cutting device)
- cup/ bowl (to hold water)
- pliers
- sewing needle & white sewing thread
- pins/ tacks
- mat (cardboard or styrofoam or similar)
- small paintbrush
- pencil
- thin black Sharpie
- metallic gold pen/ fine tip marker

Step 2: Pages of the Diary

Note: Always fold the paper hamburger-style
First, fold the printer paper in half. Make a sharp crease and use the envelope cutter to cut it. Then fold those pieces in half and cut them again. Set one of the pieces aside; we only need 3/4 of the paper. Then fold the remaining pieces in half and cut them. Cut the pieces in half one more time, then fold them all in half but don't cut them.
Unfold the pages, stack 3 together and fold them back up. You should have 4 groups of 3 pages. Cut 1 cm off the bottoms of the pages so they look more proportional.
They should now look like the last picture.

Step 3: Mini Book Binding

Since the pages aren't as important, I modified how I usually book bind so it would be faster.
So instead of my usual 5 pins, I'm only using 3. It occurred to me afterward that 2 pins might have been better but it works out.
On your mat, open up the pages so each piece of paper is lying flat on each other. Stick 3 pins through the crease; two on the ends and one in the middle.
Repeat with your other 3 piles. Take one of the previously pinned papers (alliteration!) and put it on top of the rest of the stacks when you poke holes through them so the holes are aligned when you sew them together.
For the book binding itself, I am writing the instructions on the photos since that's probably more helpful.

When everything is successfully sewed, apply glue to the spine and put it under a weight (ex. a dictionary)

Step 4: The Cover

At first, I had wanted the fabric to be the outside cover and the paper on the inside, but I found fabric just didn't have the effect that the paper had (and it wouldn't stay closed), so I ended up reversing them. You don't need to use fabric on the inside. You could probably use paper with the same effect. I used my fabric because it looks like the fuzzy side of leather.
Draw a rectangle slightly bigger than the pages. Also draw and cut out the spine; make it slightly thinner than the actual width of the spine and the same length as the cover.
Use the templates to cut out pieces of the fabric you chose. Cut out two covers and one spine.
Cut a piece of thick paper for the outside cover the length of the 2 inside covers and spine, plus about 2 mm (1 mm space on either side of the spine).
Cut/ tear a hole in the inside front cover fabric where the basilisk fang would have pierced through.
Glue the fabric to the paper as shown in the photo.
Fold the outside cover along the spaces provided in the inside cover.
Using your scissors, stab through the fabric hole through the paper. Make a big gaping hole!

Step 5: Painting the Cover

Time to paint the cover. This step is pretty self explanatory; just make sure you get the edges of the paper and the inside cover too.
After it's dry, continue cutting/ tearing at the hole, preferably making some tear marks going up and down. Don't worry about the white paper showing; it will be covered up soon.
Also after it's dry, open it up and stick a pin through the spine (near the top) and put a jump ring through.

Step 6: A Cup of Tea...

While waiting for the paint to dry, start tea staining the pages!
Get a cup of water (not too much water as it will dilute the color) and put a tea bag in it. I do not think the water temperature or tea type matter. I used room temp water and green tea. Let it steep for a minute or two. I've always pulled out the tea bag and dabbed it on the paper to "age" it, however it seemed too tedious so I just threw the whole thing into the tea (perhaps to mimic being thrown into a toilet? Don't actually throw it into a toilet ;)
Open up the pages to make sure they are all stained (be careful not to rip the paper!)
Carefully pull it out and lay it on a flat surface to dry. You can put it under a weight but I didn't and it was perfectly fine.
After just pulling it out of the tea, the pages will look pale yellow. Don't worry; it will darken as it dries.
I really like the effect and this may be my new preferred way to tea strain paper.

Step 7: Glue Together!

After the pages have mostly dried (this could be overnight), apply some glue to the spine (super glue would have been preferred but I only had school glue- worked fine). Put the pages into the cover (make sure the jump ring can still move) and place under a weight again.

Step 8: The Basilisk Fang

At long last, while the glue is drying, the basilisk fang!
I actually tried a lot of different techniques (with wire, etc) and was getting frustrated (about 3 failed attempts) when I thought of this and decided to try it. It came out surprisingly well.
Cut a long strip of thick paper a little less than 1 cm wide and 12 inches long (30.5 cm). Sorry about the different measurement systems- I use both depending on which is easier!
Start rolling it up very tightly. The tightness is key! Once you're done, take a tiny bit of tape to secure the end. Gently start to push the center of the roll out so it becomes a cone. Be careful not to push so hard that the spirals come undone.
Gently curve the cone so it resembles a fang. Pour glue down the hollow interior to harden it. It should slide down to fill the bottom. Keep pouring. At this time get out that eye pin (this is another instance super glue would have been helpful) and stick it in the middle of the glue. Let the glue dry slightly. Start pushing in the top edge of the fang so it resembles the root of a tooth.
A basilisk fang doesn't have ridges so we're going to use paper mache to cover them up. Mix together 1 part water to 3 parts glue (or your preferred paper mache recipe). Dip in the thin strips of loose leaf paper (any type of thin paper) into the glue water solution and carefully begin covering the fang, starting from the tip. Be careful not to soak the fang since the paper might start to sag with too much water (this happened the first time I tried this and I had to make another). Make sure to cover the top of the fang too!
Let dry.

Step 9: Painting the Basilisk Fang

Get out your paints!
Start out by painting the whole fang white and letting it dry. Then mix some black paint to make a light gray. Start painting streaks of gray starting from the top. Eventually I ditched my paintbrush and used my finger to blend the white and light gray (take some white paint and "smooth out" the border line).
Then add more black paint to the light gray and paint the darker gray at the "root" of the fang, blending.
Let this dry.
For the varnish: I don't know what the recommended sealant would be but I've used clear nail polish before and it has worked fine. Add a coat of clear nail polish to the fang. Let dry in a ventilated area (by an open window preferably).

Step 10: The Stab Wound

Using some of the dark gray paint from the last step, paint the area around the stab wound.
Now, poke your scissors through the hole and start piercing the pages. Continue doing this, a couple pages at a time.
Poke the basilisk fang through to see how many more pages you need to do. The tip of the fang shouldn't poke out. In my case, I ended up piercing the majority of the pages.

Step 11: Accents on the Diary

Now for the small details to the diary.
The corners: I drew the corners on paper, but you can always print a picture of Tom Riddle's diary and use the corners there.
Put the paper over the aluminum foil and trace the outline (with a pencil or any dully pointed object). It should transfer to the foil.
Use your metallic gold pen to fill in the outline. Use your extra fine tip Sharpie to add the details.
Cut out carefully, and leave a margin as shown in the sixth picture.
Apply glue to the back and fold it over one of the corners of the diary.
Repeat three more times.
When done, use your metallic gold pen to color in the insides of the corners.

Step 12: Tom Marvolo Riddle

As in the last step, write out Lord Voldemort's former name on paper and transfer it onto the aluminum foil. Flip the foil over so the words are backwards and trace over them again so the words pop out on the other side. Trace a box around the name.
On the right side, paint over the entire thing in black paint. You will still be able to see the words and box.
Very carefully, trace the words over with your metallic gold pen. Do it very lightly so there is less chance it will get on anything other than the popped out words.
Finally, cut it out around the box and glue it to the back cover of the diary.

Step 13: Final Touches

Take out your necklace chain. Measure out a length that just lets the fang stab into the diary but is not so long that it dangles out of sight below the diary.
If your chain already looks antique, there is no need for this next step. However, if your chain is bright and shiny like mine, you will need to cover it in black paint and then rub it off again.
Open up the two end chain links and attach one to the basilisk fang and one to the diary.
Attach another jump ring to the existing one on the diary.

Step 14: The Leather Cord

I had an existing leather cord necklace but here is how to make one yourself.
Cut a length of leather/ suede cord that can fit over your head. Find a matching bead. Make sure that the hole in the bead is just the right size so that two pieces of cord can snugly fit inside (the bead should not freely slide along the cord but it should still be moveable).
Tie a knot at one end of the cord, put the bead on, then thread the top jump ring onto the cord. Pull the end of the cord through the bead again and tie a knot.

Step 15: Conclusion

And you're done!!!

This project was a lot of trial and error however I am very pleased with the result!
I hope you liked this Instructable and enjoy your [former] Horcrux necklace!