Are there international treaties regarding the ownership and trade of rare gemstones?

Jul 1, 2022 ... Ever wonder what is the rarest cut of diamond? The jubilee cut remains one of the rarest diamond cuts that do not feature a table; instead, it ... Apr 6, 2025 ... Explore the world's most expensive diamonds that surpass the cost of private islands. Discover rare gems that redefine luxury and opulence. 6 days ago ... The Pink Star is the most expensive diamond in the world, sold for $83 million. Known for its vivid pink colour and flawless clarity, ... Apr 8, 2025 ... A rare blue diamond was on display Tuesday at an exhibition of $100 million worth of the world's rarest diamonds in the United Arab ... The Pink Star set the jewelry world ablaze in April 2017, when it sold at auction for a staggering $71.2 million at Sotheby's in Hong Kong. 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 ... 10. The Moussaieff Red Diamond — Up to $8 million ... Starting our list of the top most expensive diamonds in the world is the Moussaieff Red ... Sep 14, 2022 ... The Koh-i-Noor (Mountain of Light Diamond) ... The most valuable diamond in the world is Koh-i-Noor, also spelled Koh-i-Nur and Kohinoor. The ... 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 ... Oct 24, 2019 ... An Auction Item. Article content. The Argyle closing is expected to bring renewed attention to pink diamonds at auction as buyers snap up ...