Diamond And Ruby Trinkets Of The 'Queen's' Jewel Case

4.  Bulgari Blue Diamond Ring

This sensational ring was designed by the legendary Bulgari Company in the 1970s, and was purchased in1972 by a man who gave it to his wife after the birth of their first child. It features a triangle-shaped colorless 9.87-carat diamond, as well as a triangle-shaped fancy vivid blue diamond of 10.95 carats—the largest of its kind ever to be sold at auction.

The combined diamond worth on this ring is truly astounding: it was purchased by an Asian collector for $15.76 million after a three-way bidding war.

5. The Wittelsbach-Graff Diamond

This piece of bling has a long and storied history. Originally discovered in the mines of the Indian kingdom of Golkonda, this 35.56-carat diamond was supposedly included in the dowry of the daughter of King Philip IV of Spain, Margaret Theresa, in 1664. It went into private collection in the 1960s, and was sold to its current owner in 2008 for $23.4 million, holding the title of the most expensive piece of jewelry ever sold in auction until the Graff Pink eclipsed it in 2010.

The same man, London-based jeweler Laurence Graff, owns both this diamond and the Graff Pink. Graff raised eyebrows when he announced his intention to alter the Wittelsbach diamond, but moved forward nonetheless. 4.45 carats and indeterminable historical significance were lost in the process, but the resulting diamond is technically of higher caliber.