what is interesting is tecla is born in 1908, and same year, the Mikimoto process was copyrighted.
It seems the very early Mikimoto results were in 1893, I was thinking about much later results, maybe 20's or so.
It's explaining now why I found cultured pearls with nice gold clasps and old mine cut diamonds, and old mountings, just because cultured pearls were available since late of the XIX.
My profile photo is old clasp from late XIX, and it was a cultured pearl necklace, old quality ones.