from the XL chain
a locket clasp
of the  5mm and 4mm rings
pendants

Ultra simple assembly:

Start by measuring your wrist and divide the value by 2.

Cut the 2 pieces of chain.

Open a link of the twisted oval chain to connect the oval chain and then close the link. This allows you a simple and direct attachment without having to add a ring.

Then place the clasp directly into the chains.

Finally, place the astro pendant with a 4mm ring and the stone heart with a 5mm ring, being very careful not to damage the stone.

And there you have it! Beautiful creation!