There are numerous individuals who will get an antique plate or teapot from family members. There are some others who might stumble on what they think could be an antique at a flea market. If you think what you have is worth something than you must have it evaluated.
To know the exact value of the piece you have to take it to a professional who will study it for a couple of days. Yet, there are things that you can do to help you find out if this is even necessary. You don't want to spend a hundred dollars on somebody if the piece is nothing more than a replication.
The value of an antique is based upon who made it, what time period it was produced in, the pattern, and if it is broken at all. Buy an identification guide. This is a thick book that will have information and pictures on a variety of antiques that are from around the world. Attempt to discover a picture of what you own or something similar to it.
If you are not able to acquire the right piece than try to look for the maker's mark. This mark is usually located on the bottom of every piece. It may be a signature or a unique design. Use this mark as a reference to discover who produced the piece and the time period. Next to the maker's mark you need to search for a date. This can tell you quickly if it is a knock off or not.
You need to look at the piece cautiously for any chips, fissures, discoloration, or other flaws. Utilize a magnifying glass to get a closer look at it and make sure to record what you find. If you decide to have your antique appraised you need to give any information you have.