Russia, Britain & France all wanted control of India for it's riches & treasures. What exactly were these riches & treasures? If spices, which ones?

One likely reason you aren't getting a response is that this looks a lot like homework question. We don't do those here - sorry. Education is not just about facts. It also about learning how to find information and to judge its relevance and credibility on your own.

In any case... I suggest that you think of some key words that might be relevant, and do a set of searches based on them... always keeping in mind that you have to be careful in evaluating the sources.