A pair of diamonds that formed hundreds of kilometers deep in Earth’s malleable mantle both contain specks of materials that form in completely opposing chemical environments—a combination so unusual ...

Seemingly contradictory materials are trapped together in two glittering diamonds from South Africa, shedding light on how ...

If you buy through a BGR link, we may earn an affiliate commission, helping support our expert product labs. Pink diamonds are some of the rarest gems you’ll find on the planet. In fact, these ...

What is a gem? -- How gems form -- Crystals -- Classifying gems -- Physical properties -- Optical properties -- Where gemstones are found -- Mining gemstones ...