[Ans] In which country were diamonds first mined?

Step 1 : Introduction to the question "in which country were diamonds first mined?"

Most natural diamonds are formed at high temperature and pressure at depths of 140 to 190 kilometers (87 to 118 mi) in the Earth's mantle. Carbon-containing minerals provide the carbon source, and the growth occurs over periods from 1 billion to 3.3 billion years (25% to 75% of the age of the Earth).

Step 2 : Answer to the question "in which country were diamonds first mined?"

Diamonds are thought to have been first recognized and mined in India, where significant alluvial deposits of the stone could be found many centuries ago along the rivers Penner, Krishna and Godavari. Diamonds have been known in India for at least 3,000 years but most likely 6,000 years

Step 3 : Other interesting facts related to the question "in which country were diamonds first mined?"

A large, flawless diamond is known as a paragon. Pure diamond should transmit visible light and appear as a clear colorless crystal. Approximately 130,000,000 carats (26,000 kg) of diamonds are mined annually, with a total value of nearly USD 9 billion, and about 100,000 kg (220,000 lb) are synthesized annually.