What are the current best practices in diamond security for retailers and collectors?

We have created a list of the 15 most expensive diamonds ever sold. The most valuable diamonds are remarkably large or have exceptional color and clarity. Mar 12, 2025 ... Top 10 Rarest Diamonds in the World · 1. Red Diamonds - · 2. The Pink Star Diamond - · 3. The Hope Diamond - · 4. The Oppenheimer Blue Diamond - · 5 ... Oct 10, 2023 ... But even jewelry-grade diamonds aren't very rare. While we don't have a global estimate for how many diamonds are available in the world, at ... It's estimated that only around 20 to 30 true gem-quality red diamonds exist in the world, some weighing less than one carat. Dec 27, 2024 ... While diamonds are traditionally considered the most precious gemstone, there are other rare stones, such as Red Beryl, that are even rarer and ... It's called the Winston Red Diamond, and what makes it so exceptional is the nature of its redness. Designated as a “fancy red” by the Gemological Institute of ... Apr 8, 2025 ... “The largest red diamond in the world is 5.11 carats, and this is 5.05 carats,” says Redmayne. Red diamonds are so rare, he adds, that legendary ... Sep 22, 2023 ... What's the most expensive diamond in the world? The most expensive diamond with a monetary valuation is The Cullinan Diamond. Only The Kohinoor ... While red diamonds are the rarest option, make sure that you don't miss what's most important: you have options! If red isn't your style, you're lucky. You're ... 'The Oppenheimer Blue can only be described as one of the rarest gems in the world,' says Curiel. 'It is the gem of gems.' Related departments ...