A diamond unearthed in the southern African nation of Lesotho could yield one of the largest and highest quality round polished diamonds , according to a statement Monday from company that found it . Diamond could yield one of the largest and highest quality round polished 0 . 8 stone allowing it to be of the highest color grading available . Diamond found in Diamond Mine , in Lesotho .
Diamond could yield one of the largest and highest quality round polished 0 . 8 stone allowing it to be of the highest color grading available . Diamond found in Diamond Mine , in Lesotho .