The term 'Psychometry' is attributed to Joseph Rodes Buchanan who, in 1893, used it to describe the obtaining of information by holding an object and psychically 'obtaining' it's history.
So, it's basically, holding or touching an object and 'sensing' the things that have happened to it, the places it has been and the emotions or feelings attached to it.
Psychometry has been used to help solve crimes, murders and missing persons cases, as well as 'reading' historic sites and locations, and there are quite a few books around that go into the subject in much more detail than I do here.
How to Develop Psychometry
There are ways to develop your psychometry abilities. This can be achieved by gathering a group of like-minded people together in a place where there are no distractions. Each person should have a pen or pencil and paper to record the readings.
Each person decides what his or her object will be used and places it on a central table. The chosen objects should be owned only by the person offering it, such as jewelry or a key ring. Antiques or articles that have been owned by more than one person should be avoided for use in psychometry exercises, because these multi-owner objects can contain the energy of multiple people and places, which may well confuse the 'trainee'.
To hone your psychometry skills, relax, keep an open mind, concentrate and 'tune in' to the object, this is done by touching or holding it.
Next, write down initial impressions, including emotions and physical responses. Don’t try to process them immediately. Allow impressions to flow; don’t try to force them. If there are too many initial perceptions, don’t respond immediately. Allow them to become clearer. If an impression makes no sense, record it because the meaning usually becomes clearer with time. Record anything that you sense, feel or see in your minds eye, you can refer back to it later.
When all impressions are recorded, each person participating in the exercise will express his or her impressions and the object’s owner will be asked to confirm or deny it. It's important to maintain a good attitude and you shouldn't be upset if most or all impressions are incorrect. Inaccuracy is not uncommon when first starting out and as people continue to develop psychometry, the impressions will become clearer and more accurate.
You need to remember, you are new at this, and it will take time to open the doors that have been shut up to now. As with any sort of self development program the key is practice!
You may, of course, want to practice and refine your skills with just a single friend. This may be an option if you don't like large groups, as you will feel more relaxed and able to open up, more so than with a group of strangers.