How did India react and feel when the Kohinoor Diamond was Given to the British?

"India" is not a person, not a feeling entity.

I doubt if it was even first recognized as a diamond, as it is blue. And sapphires, which are blue, come natural in India, there are still mines today.

I guess the Indians couldn't have cared less than about a lousy diamond, they were a British colony back then. Which worked deliberately fine, the local rulers had some arrangements with the colonisers, and there was never so much slavery in India as it had been in Africa. Until today, bribery ("bakshish") is part of the Indian culture, and I wouldn't wonder if a big diamond could have been a fair price for one federal state.

Most likely nearly everybody in the Indian subcontinent (India, Pakistan, Bangladesh, etc - much of which was under British or other European rule) at that time would not have heard of that diamond.