In order to understand more about your antiques, it is best to have a human eye take a good look. (You can't upload pictures onto this site) There are antique appraisal sites online. They don't cost much but, as they say, you get what you pay for. You may get some helpful information from one of these sites.
In order to learn if a piece is an authentic antique or a reproduction, an expert will need to view various parts of a piece. If you go the online route, make sure you include pictures of any labels or marks found on the bottom of the item. To judge the age of, say, wooden furniture, one must view or feel the way the wood has been cut. They need to be able to see what kind of wood it is made out of and get a good look at how the piece was put together. You can tell an antique from reproduction by the cuts. There is a difference between machine cuts and hand cuts. Some of this you can do yourself after some research.
There are people out there who swear they can tell the difference between real antique furniture and a modern reproduction by smell. I know a woman who can tell an authentic piece of Depression Glass from reproduction by feeling it; she can tell by the thickness as well as the heft of the dish.
Remember that there is a difference between reproduction and fake. A reproduction is made to mimic an older piece so that people can use and enjoy it; they just like the look. A fake is made in order to pretend a piece is actually old in order to trick an unsuspecting buyer into thinking the piece is authentic. It can be difficult for someone who is not an expert and who is not checking out the piece in person to tell if an item is a fake.