40cm rosary chain
 a connector
 6 round pendants
 9 rings 3mm
 a clasp
 an extension chain

 Jewelry making pliers

To start, cut 2 pieces of 20cm rosary chain. Make sure both chains are exactly the same.

Next, open a 3mm ring and attach the connector to the chain. Then assemble symmetrically with the second chain.

Using 3mm rings, attach the small round pendants to the chain.

Skip one bead between each medallion and be careful to assemble them symmetrically.

To finish, attach the clasp on one side of the chain and an extension chain piece on the other.

And there you go! Beautiful creation!