You are quite the hunter!
Judging from the several types of metal work deployed on the pin, it could have come out of a tidy workshop with a talented hand at the bench, not a mass-market jewelry catalog.
Wouldn't be too surprised if the pearl as natural, especially if under 6mm. 'Found a couple of small natural pearls set in old jewelry for comparable prices too... I'm not hunting much these days (it used to be a 'sport' to ward of exam stress
); my favorite 'haunts' were these two websites: GoAntiques and Trocadero.
Must say though... your hand is better! Wouldn't this orchid pin be just the thing to tie down a long pearl rope?
And the other, silver pin you found is definitely one piece I wish I had found first...