But also, what cleric of Shar would wear their symbol on their chest, right in your face?
uh..is this a trick question? We have one in our party.
In general... meaning this, I don't think the average person has any idea what the Shar symbol looks like. It's probably a DC on a roll to figure out. Because Shar worshipers don't go around flaunting that they're Shar worshipers.
I would also guess that it's *typically* out of character for a Shar worshiper to wear their symbol so publicly.
Again, I think the average person, not even knowing the Shar symbol, would see a black circle of onyx and think jewelry.