Thanks for your question.

Without seeing the extent of the broken tooth it is difficult to give you an ideal solution. In the case of cracked or fractured teeth, often the best solution is crowning the tooth. Simply bonding the tooth back together will more than likely break it again, probably worse than the first time. A crown will support the remaining tooth structure and prevent any further breaking of the tooth. So, if this is what your dentist has advised, it is likely to be the best solution for you.
There are many different materials crowns can be made from. If you are looking for a cosmetic, natural looking crown, the most popular at the moment is an E-max crown. However, there are many options for different types of ceramic/metal-ceramic crowns which can all be made to look very life-like.

I hope that helps.

Kind regards,
Mark.