Jenn your not going to believe this but I found almost the exact same cross as that in a church also that was located in a sea- side town.
Its just like that design except it has red stones in the centre and at each of the four corners & little clear stones radiating out from the
little 'starburst' centre design.
Such a co-incidence; Should i try to upload it too as a 'SNAP'.......I'll call mine the 'red-cross'....you have a 'blue one',,,,,Divine mercy kind of colors!! Unless there are other colours out there!
Never thought of it as a 'gift from heaven before'. Such a lovely way to look at it!
How you happened upon your 'blue-cross' sounds the most mysterious of all however. Very amazing!