What is the value of a 2 carat purplish pink diamond?

Your answer depends on the clarity and the cut of the stone, in addition to the attribution of the colour. If the colour is natural, it will be worth more than if the diamond has been treated.

A local gemologist can give you the information you want when you pay for a certificate for this particular diamond.

You can follow the link below, to learn more about the diamond's colour, which from your description appears to be its highlight.