A branch pendant
 A 4mm set pendant
 Chain
 Oval rings
 A clasp
 Extension chain

To start, cut 2 pieces of chain about 18cm each for a choker necklace. Adjust the length to your liking.

Next, open an oval ring and then attach a piece of chain to the pendant. Do the same with the other chain.

In the center of the pendant, you will see a ring; it is open and will allow you to connect the setting directly without an additional ring. 

To finish, at the ends of the chains, place the lobster clasp on one side and the extension chain on the other side.

And there you go! Beautiful creation!