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Pumpkin Diamond
Weight	5.54 carats (1.108 g)
Color	Fancy Vivid Orange
Cut	Cushion
Country of origin	South Africa
Mine of origin	unknown
Date discovered	1997
Cut by	William Goldberg
Original owner	unnamed farmer
Current owner	House of Harry Winston
Estimated value	USD 3 million

The Pumpkin Diamond is a diamond measuring 5.54 carats (1.108 g) rated in color as Fancy Vivid Orange by the Gemological Institute of America. While this may seem relatively small when compared to other famous diamonds, the Pumpkin Diamond is, in fact, one of the largest Fancy Vivid Oranges the GIA reports having rated and is unique compared to other orange diamonds because it is relatively light-colored and notably intense. The Pumpkin Diamond was mined in South Africa, cut and polished by William Goldberg, and put to auction at Sotheby's where it was bought by Ronald Winston of the House of Harry Winston for the price of $1.3 million. It is currently estimated to be valued at $3 million.

Formerly referred to simply as the 5.54 Vivid Orange, Winston named the diamond "The Pumpkin Diamond" as he bought it the day before Halloween. After buying the Pumpkin, Winston proceeded to have the diamond set in a ring between two smaller white diamonds. Halle Berry wore the ring to the 2002 Oscars where she won the Academy Award for Best Actress for her role in Monster's Ball.

While it is difficult to tell exactly what status the Pumpkin Diamond currently enjoys, the official GIA web site reports it as "one of the largest Fancy Vivid orange natural color diamonds in the world." The Color Diamond Encyclopedia, on the other hand, terms it "the world's largest fancy vivid orange diamond." In 1997, when it was purchased by The House of Harry Winston, the Gemstone Forecaster referred to it as "the only vivid orange ever graded by the GIA."

The Pumpkin Diamond was displayed as part of the Smithsonian's "The Splendor of Diamonds" exhibit, alongside The De Beers Millennium Star, the world’s largest top colour (D) internally and externally flawless pear-shaped diamond at 203.04 carat (40.608 g) and The Heart of Eternity, a 27.64 carat (5.528 g) heart-cut blue diamond.

• Gemological Institute of America. "The Pumpkin Diamond". Retrieved April 13, 2005.
• The World of Famous Diamonds. "The Pumpkin". Retrieved 23 September 2006
• Smithsonian Museum of Natural History. "The Splendor of Diamonds". Retrieved April 13, 2005.
• Color Diamond Encyclopedia. "The Pumpkin (Vivid Orange)". Retrieved April 13, 2005.
• Gemstone Forecaster. "AUCTION REPORT (OCTOBER SALES)". Retrieved April 13, 2005.
• AM Diamonds. "Famous Diamonds: The Pumpkin Diamond". Retrieved April 13, 2005.