Retrieving these gems usually involves open-pit or underground mining. But some diamonds are also retrieved from riverbeds whose streams eroded kimberlite deposits upstream, while others are ...

Surrounded by 16 white pear-shaped and cushion-cut diamonds and hanging from a chain with 45 diamonds, the rare gem attracts 6 ... evidence of diamonds in them. Those Kimberlites date to ...

The kimberlite diamond mine Mir in eastern Siberia, one of the largest excavated holes in the world. Credit... Aleksey Suvorov/Alamy. By Maya Wei-Haas. Published July 26, 2023 Updated Aug. 2, 2023.

Sparkling diamonds and verdant emeralds are some of the most coveted and priciest gemstones. But which precious stones are rarer: diamonds or emeralds? In terms of total known deposits, emeralds ...

Researchers suggest that the famed Golconda diamonds, including the Hope Diamond and Koh-i-noor, may have originated from a volcanic outcrop nearly 200 miles from where they were mined.

The couple then took the gem to the park's Diamond Discovery Center, ... that's where diamonds can form. Diamond bearing kimberlite and lamproite are relatively rare and we have found only 60 ...

A rare 170-carat pink diamond has been discovered in an Angola ... 170-Carat Pink Diamond May Be Largest Gem of its Type Found in 300 ... also known as "kimberlite pipes" to find the gems, ...

An English company captures carbon from the atmosphere to create lab-grown gems. By Ming Liu Lab-grown diamonds are reaching new heights — quite literally — because of Skydiamond, an English ...