The dreamt of jeweller is someone who understand the human need to have a symbol, such as a ring or brooch to represent important parts of themselves, important ties and relationships. The jeweller is also a person who understands the power and influence of crystals and precious metals. So the dream may point out important influences in your inner life.
The jeweller can also be representing the contact with your contact with the universal mind which holds information about all things. But don’t forget that this information is the summary of all human endeavour and thought, so is not all knowing, but it is a wonderful way of gaining insight.