03/05/2012 at 06:05 PM EST
Nicole "Snooki" Polizzi demanded a big engagement ring – but is that what she got?
A few hours after PEOPLE broke the news of her engagement, the pregnant Jersey Shore star
– who just said "yes"
to a proposal from Jionni LaValle
– was photographed wearing some fancy ring-finger bling that a source tells PEOPLE LaValle picked out himself.
"He knows it should be big, 'cause if it's small I'm saying no, like, 'Get another ring!' " Polizzi, 24, told PEOPLE in January, prior to her engagement.
Sporting long, straight dark hair with thick burgundy undertones, the pint-sized reality princess accompanied BFF Jenni "JWoww" Farley, as the two gals took their dogs to the K9dergarten, while they filmed their spinoff in Jersey City, N.J.
An onlooker says Polizzi eventually removed the flashy jewelry as the day of shooting progressed.
Reporting by LESLEY MESSER