More stories by 'Katie Warren'

I followed the months-long journey of a Russian diamond, which starts out hidden in ore in Siberia and travels more than 9,000km before becoming a store-ready gem

What it's like going to the world's biggest horse sale, where royals and millionaires dropped R5 billion this year on horses they hope might be the next Kentucky Derby winner

More than half of India's 100 richest people lost money in the past year, but the country's richest man got R60 billion richer.

Glenlivet is trying to get customers on board with drinking whiskey out of little pods that dissolve in your mouth — and people have questions

The asking price for this Los Angeles megamansion – which has been on the market for two years – just went up by R300 million. Take a look inside.

The drugmaker behind OxyContin just filed for bankruptcy. Meet the Sacklers, who built their R190 billion fortune off the controversial prescription drug.

A day in the life of a Russian diamond miner in Siberia, who wakes up at 5:30 a.m., spends 9 hours a day in the mine, and gets 76 vacation days per year

Steven Spielberg is one of the wealthiest filmmakers in the world. Take a look at what the billionaire's life is really like