I always use two-part epoxy to hold pearls - the 24 hour cure type.
If that fails, then I go with a tiny wedge placed in a slit in the
end of the post. As the pearl is pushed down the post, the wedge is
forced down the slit. That spreads the sides and secures the pearl.
In both techniques, a tight fitting post is important. Little ridges
on the side of the post are necessary with epoxy.
Judy in Kansas, where the temps have been perfect to work in the
Now is also the time to clean out nest boxes.