The scarcity of high-quality natural turquoise has been driving up prices — a rare stone from a classic mine may cost 25 to 30 times what it did 25 years ago, experts say — but there is no ...

Turquoise makes a striking contrast against diamonds in this diadem from the 1800s. But the gems were actually added in the 1950s, replacing the diadem’s original emeralds. Chip Clark, modified ...

MANISTIQUE, MI — Upon seeing the turquoise and emerald waters of Kitch-iti-kipi, it’s hard to believe the magnificent natural spring could ever be used as a dump.