More unusual stones, such as black diamonds, are becoming popular and pricey due to the influence of celebrities wearing them ...

Many are colorless, but most are pale shades of yellow; red, orange, green, blue, brown, and even black diamonds are also found. Raw, uncut stones lack the exuberance of jewelry-store gems and can ...

black diamond consists of aggregations of individual crystals, which lend the gem its dark color. The largest diamond ever found was a carbonado from Brazil; named Sergio, the stone weighed 3,167 ...

A billion-year-old black diamond, believed to be the world's largest ... There are competing theories about the origins of the stone, including that it was carried to Earth by an asteroid.

The rarity of precious gemstones comes down to the geologic process of their formation. Sparkling diamonds and verdant emeralds are some of the most coveted and priciest gemstones. But which ...

The most valuable black opal features bright red stone against a very black base. In the '80s and '90s, gem-quality brown diamonds were worth about $1,500 per carat, but now many sell for up to $ ...

Stone’s research, spurred by her 2019 article in America’s Civil War magazine titled “Peril on the Potomac: The Sinking of Black Diamond,” has uncovered over 20 previously unknown victims ...

The stone in question – a whopper of a faceted black diamond encircled by pavé diamonds – also boasts three rows of diamonds on the ring’s shank, and taps into Gabbriette’s gothic proclivities (think ...