Blue diamond is considered as the most expensive gemstone in the world. Priced at $3.9 million or P225 million per carat, it is a very pricey gemstone. While blue is one of the rarest diamond colors ...

“The Mediterranean Blue” is 10.3-carat fancy vivid blue diamond with a VS2 clarity grade. It's the highlight of Sotheby's High Jewelry sale in Geneva. Fancy vivid blue diamonds of more than 10 carats ...

Recent reports have spotlighted the most expensive diamonds ever purchased, capturing the fascination of collectors worldwide. On March 2, 2025, a detailed account of these record-breaking sales was ...

Nothing says love like a diamond, especially a stunning blue diamond that's now up for auction. Feast your eyes on the largest flawless vivid blue diamond in the world. Weighing 13.22 carats, the ...

The Smithsonian’s National Museum of Natural History has acquired the 2.33-carat “Winston Red Diamond,” one of the world’s largest fancy red diamonds. It will be unveiled to the public on April 1 as ...

Of all the stones in the world, diamonds might just come with the most enduring lore: They are a girl’s best friend, they never go out of style, and they always make the perfect gift. The lore endures ...

Scientists have created the first sizable meteorite diamond — also known as lonsdaleite or hexagonal diamond — a material predicted to be even harder than the diamonds normally found on Earth. The ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...