HOW DID Tiffany & Co. arrive at its signature shade of blue, a robin’s-egg hue the jewelry brand uses for everything from its stores to its packaging? The company’s chief gemologist, Victoria Wirth ...

Popularized by Turkish traders, embraced by Native Americans and now mined extensively by the Chinese, turquoise varies so widely in color and form that many American Indians say no two stones are ...

Few stones inspire thoughts of summer quite like turquoise, offered in vivid hues ranging from a clear, pale blue sky to a robin’s egg tone or a deep azure that conjures images of Caribbean waters.

My morning walk took me by the Oroville High School, and since no students were there at 6 a.m., I entered the opened gate. Passing through, I saw some bright blue objects under a shady tree, and I ...

They may not be as “precious” as diamonds or emeralds, but these scarce gems are just as valuable—if not more so. Tanzanite is a beautiful blue variety of the mineral zoisite and found only in a small ...

Forbes contributors publish independent expert analyses and insights. I am the founder of La Patiala, the luxury encyclopedia. Turquoise is one of December’s birthstones — the other December ...

From ancient Egyptians to New Age hippies, hard stones have long been thought to possess magical properties, and are now undergoing a revival in the watch and jewellery world as their symbolism and ...