Veneer or Lumineer on One Tooth?

If you are satisfied with the alignment of your teeth and you are doing a veneer purely to change the color of a single tooth then your best option is a traditional veneer, NOT a Lumineer. I would also suggest you consider simply cutting the "white mark" out of your tooth and replacing the white mark with composite.  If you are otherwise satisfied with your teeth this would be a much less expensive and less invasive procedure.

As stated previously, restoring a single front tooth with a veneer or crown is THE most challenging cosmetic procedure in dentistry. You must work with a dentist who uses the highest quality lab and has a close relationship with that lab.

Good luck!

And in my opinion an inferior brand. Depending on your goal, more than a single tooth may be required, but if doing just one, I would suggest layered Empress or feldspathic from an experienced cosmetic lab.

In my opinion I would do the most conservative treatment possible which would be to eliminate the white spot and place a composite restoration.  If that is not satisfactory then I would consider 2,4 or 6 veneers not lumineers as I think that is an inferior product.  What I would not do is a single veneer as it is one of the most difficult things to do in dentistry.