What is diamond synthesis?

Oct 7, 2023 ... The 10 Most Expensive Diamonds Ever Sold at Auction · 1) Pink Star. Price: $71.2 million · 2) Oppenheimer Blue. Price: $57.5 million · 3) Pink ... Red diamonds are commonly known as the most expensive and the rarest diamond ... ^ Argyle Everglow : One of the world's rarest Red Diamonds unveiled in New York ... The Cullinan II, also called The Star of Africa, is worth about $400 million and is the largest polished white diamond in the world. Jan 7, 2017 ... The rarest of the fancy colored diamonds are the saturated pinks, greens and blues. The least rare are the yellows and browns. Apr 9, 2025 ... The World's Most Expensive Gemstones · The Pink Star Diamond – $71.2 Million · The Oppenheimer Blue – $57.6 Million · The Estrela de Fura Ruby – ... Apr 9, 2025 ... A rare blue diamond was among the treasures on display at an exhibition of $100 million worth of the world's rarest diamonds in the United ... 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? 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 ... 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 ... In this article, we will take a look at the top 5 world's rarest diamonds and explain why they have such a hefty price tags.