The ancient Indians were the first in the world to take notice of the mineral diamond for its beauty .
Diamond was discovered by the Indians in the eighth century B.C. They used to collect diamonds from its secondary
sources i.e., the quaternary gravel beds and gravel bars in the sediments. Despite this ancient
tradition, the primary sources of diamonds (kimberlite, lamproite, and other kimberlite clan rocks)
have been found in India only after its Independence (except the Majhgawan pipe).The diamondiferous
Majhgawan pipe has operated as India's only significant primary diamond mine with a grade of about
10 carats per hundred tonnes.....
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