LAS VEGAS, NEVADA - JANUARY 09: Walmart Inc. President and CEO Doug McMillon delivers a keynote address during CES 2024 at The Venetian Resort Las Vegas on January 9, 2024 in Las Vegas, Nevada. CES, the world's largest annual consumer technology trade show, runs through January 12 and features about 4,000 exhibitors showing off their latest products and services to more than 130,000 attendees.
Ultramarine blue, or "true blue," was once more valuable than gold. In 1824, a synthetic version called French ultramarine made the color more accessible. But ultramarine blue made from real lapis lazuli can sell for over $60 an ounce today.
