Of all the beguiling families of gemstones, there stands one that radiates the kaleidoscope effect of nature—the opals. These iridescent jewels are considered magical, inspiring, emotionally ...

Her husband Albert shared her love of the fiery gemstone, and she owned at least two suites of opal jewelry—including the iconic Oriental Circlet tiara, which was designed by Prince Albert and ...

Narrator: High-quality black opal can cost over $10,000 per carat, making it one of the world's most expensive gemstones. But mining black opal isn't easy. After investing tens of thousands of ...

NASA’s Perseverance rover found large crystals of quartz with a high purity on Mars, which probably had to have formed in the ...