I would like to show you two minerals with fossils inside, 1 looks grey but its acutally yellow under the light,2 could it be amber??? or fossil in limestone? no idea- both findings are from North Berwick
Photo 2 looks to be flint; I don't really see anything of note.
Photo 3 looks to be a quartz-rich pebble. The form of the quartz is ambiguous; it may have originated as part of a vein. I can't tell what the tiny darkest bits are. The dark triangle in the 'core' may be a piece of host rock (adjacent to the possible vein), which may contain a tiny dark fossil. I don't see amber. That's a lot of guesswork, but it is difficutl to say without having the specimen on-hand to study under a microscope and run tests on.