Why was India called the golden sparrow by the europeans?

because in ancient period India is the most wealthiest country in the world.And most powerful ever.If we look at the shape of country India(including Pakistan) it looks some like a sparrow.I am not sure but the ancient books tell us that in the kingdom of Chandrragupt Maurya the houses tops are made of gold.Thats why India is called golden sparrow by Europeans.