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2. Wittelsbach-Graff Diamond - Wikipedia

   en.wikipedia.org/wiki/Wittelsbach-Graff_Diamond

   On 10 December 2008, the 35.56-carat (7.112 g) Wittelsbach Diamond was sold to London-based jeweller Laurence Graff for £16.4 million sterling, or US$23.4 million, at the time the highest price ever paid at auction for a diamond. (The previous record had been held by a pear-shaped 100-carat (20 g) stone named the Star of the Season.) The ...

3. Engagement ring - Wikipedia

   en.wikipedia.org/wiki/Engagement_ring

   In the United States, the popularity of diamond engagement rings declined after World War I, even more so than after the onset of the Great Depression. [29] In 1938, the diamond cartel De Beers began a marketing campaign that would have a major impact on engagement rings. During the Great Depression of the 1930s, the price of diamonds collapsed ...

4. List of countries by diamond production - Wikipedia

   en.wikipedia.org/wiki/List_of_countries_by...

   This is a list of countries by diamond production, based on data reported by the Kimberley Process Certification Scheme. Diamond production [1] ... 12.7 Angola: 9.75 ...

5. Diamond - Wikipedia

   en.wikipedia.org/wiki/Diamond

   In 2008, the Wittelsbach Diamond, a 35.56-carat (7.112 g) blue diamond once belonging to the King of Spain, fetched over US$24 million at a Christie's auction. [58] In May 2009, a 7.03-carat (1.406 g) blue diamond fetched the highest price per carat ever paid for a diamond when it was sold at auction for 10.5 million Swiss francs (6.97 million ...

6. Diamonds as an investment - Wikipedia

   en.wikipedia.org/wiki/Diamonds_as_an_investment

   Stones near the top of a size band (or rarer fancy coloured varieties) tend to be uprated slightly. Some of the price jumps are related to marketing and consumer expectations. For example, a buyer expecting a 1 carat (200 mg) diamond solitaire engagement ring may be unwilling to accept a 0.99 carats (198 mg) diamond. [citation needed]

7. List of largest rough diamonds - Wikipedia

   en.wikipedia.org/wiki/List_of_largest_rough_diamonds

   This is a partial list of the largest non-synthetic diamonds with a rough stone (uncut) weight of over 200 carats (40 grams). [1] The list is not intended to be complete—e.g., the Cullinan (formerly Premier) mine alone has produced 135 diamonds larger than 200 carats since mining commenced.