Is strong fluorescence always undesirable?

Jan 17, 2019 ... Diamonds are mostly carbon, one of the most abundant elements on Earth. So are diamonds rare? And why do they cost so much? Sep 20, 2024 ... Let's explore the stories behind some of the rarest diamonds that have ever made their mark on this historic city. At a huge 1,109 carats, the tennis-ball sized Lesedi La Rona rough diamond was first honoured with its very own auction at Sotheby's London on June 29, 2016 but ... Apr 8, 2025 ... This superb diamond is estimated in the region of US$20 million / CHF 18 million and will make its auction debut at #SothebysGeneva in the High ... Feb 18, 2025 ... Natural red diamonds are among the rarest gemstones on Earth, and the Winston Red Diamond stands out as exceptional. At 2.33 carats, it ranks ... Mar 30, 2025 ... However, the world of diamonds is far more colorful than you might imagine. Among the spectrum of hues, some shades are so exceptionally rare ... May 16, 2023 ... Red colored diamonds are the rarest and most valuable of all the fancy color diamonds. · The Argyle diamond mine is the world's largest producer ... While all diamonds are unique, certain forms of diamonds are especially uncommon. In general, colored diamonds are very sparse, red diamonds being the rarest of ... May 22, 2024 ... And it is interesting to see that just because a color is rare, doesn't always make it the most expensive color as Red Diamonds are the rarest ... From canary yellow to exceptionally rare red, blue and green, we take a look at the top 10 most expensive coloured diamonds in the world.