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Tea is also called as green gold. This is because of different reasons. One reason is that the tea is considered very precious and is exported to many other parts. The other reason why it is called so is that when there was the requirement of labours in Assam people were given false hopes that there is a green gold in the tea plantations and were brought from central parts of India to work in Assam tea plantations.
Yes, Tea is called keen gold. But, Green Gold is also Electrum. Please see the image attached!
An alloy of 14 to 18 karat gold that is greenish in color and employs either silver or silver plus cadmium or zinc as the alloying metal.