A small round berry used in jams or jellies?

There are many small round berries used in jams and jellies, so I need a little more information to help you! Could you tell me:

* What color is the berry? (Red, blue, black, white, etc.)

* What is the general taste of the berry? (Sweet, tart, bitter, etc.)

* Where does the berry grow? (In a specific region, on a vine, etc.)

* Do you know anything else about the berry? (Its size, shape, texture, etc.)

The more details you can give me, the better I can identify the berry you're thinking of.