Wonderful world

A city made of diamonds that attracted NASA and Hollywood

AS USA
Society

A mud-covered rock found in backyard—turned out to be $100 million gem

Almudena García FelipeGreg Heilman
Society

The world’s second-largest diamond has been found — but where it will end up remains a mystery

Diego DelgadoGreg Heilman
Strange

Thieves caught trying to sneak diamond in a refrigerator

Joe Brennan
Science

Here are the 10 most valuable gemstones in the world

Joe Brennan
Society

Neither gold nor platinum: This rare mineral costs hundreds of dollars per carat

Raúl Izquierdo
Society

A million-dollar doorstop

Beto V. Álvarez
ENVIRONMENT

'Hunger stones' bring warnings from the past

Laura Martin Sanjuan