You can use either flat head nails to mount the pearl into a pendant, or eye nails (with a loop on the bottom) which will allow you to mount the pearl into a connector.

To begin, thread the pearl onto the nail and then form a right angle on the top of the pearl. You can start the angle with pliers and finish with your finger to firmly press the angle onto the pearl.

Be careful it is  very important that the right angle is glued to the pearl, this allows it to be blocked but also to form a loop centered on the top.

Then cut the nail to about 1cm. This measurement will depend on the size of the loop you want.

Using round-nose pliers, place your hand facing outward so that you are not blocked in the movement.

Position the pliers at the edge of the nail, at the location of the pliers that corresponds to the size of the nail. That is, the round-tipped pliers are flared which allows you to adjust the loop to the desired size. The location of the pliers on the nail will affect the size of the final loop.

Then bring the nail back towards the pearl to form the loop.

Be careful, proceed in stages so as not to go too far.

If necessary, balance the loop with flat pliers.

To open the loop and thus connect the pearl, open the loop upwards, never outwards, this could deform it.

And there you have it!