this piece had already come to my attention because of the unidentified inclusion in it (probably a seed) but i've found something new... and WOW! it may be tiny, but i've found a real water bubble in New Jersey cretaceous amber! you can't see it without a microscope and it isn't easy to see it moving, but i've captured two pics that show that it is definitely a water bubble. the two pictures were taken under the microscope with the amber piece tilted differently in each one. sorry no video as when i tilt the piece it involves a lot of re-adjustment to the zoom levels.
you'ss see the air bubble inside is at the top of the bubble in one shot and in the middle in the other.