That's a seed pod. If you leave it, you'll eventually be able to harvest some African Violet seeds.

Growers usually remove the flowers before seed pods develop,

Would it be better to remove it now, or harvest the seeds later?

When Irina says the seeds are "minuscule," she's not exaggerating -- we're talking dust-like .... perhaps the size of a period in size 10 font.

Nothing like jumping in with both feet! Let us know how this works out for you! Rosie

I have meant to try to get some seed pods growing but have not gotten around to it yet. If you choose to accept the challenge, I would be really interested in the progress.

Good luck!