Miners have unearthed a rare, two-colored natural diamond in Botswana — and experts say it likely formed in two stages. The diamond is half pink, half colorless. It measures about 1 by 0.63 by 0.57 ...

Miners in Botswana have unearthed a striking two-toned diamond that is half pink and half colorless, a rare natural gemstone weighing 37.41 carats. The rough diamond, examined by experts at a ...