Hope diamond

It is blue to the naked eye because of trace amounts of boron within its crystal structure, and exhibits a red phosphorescence under exposure to ultraviolet light.

Hope diamond

It is blue to the naked eye because of trace amounts of boron within its crystal structure, and exhibits a red phosphorescence under exposure to ultraviolet light.

It has been described as the "most famous diamond in the world". The diamond has been compared in size and shape to a pigeon egg, [10] walnut[11] a "good sized horse chestnut " [12] which is "pear shaped.

It has been described as being "fancy dark greyish-blue" [9] as well as being "dark blue in color" [12] or having a "steely-blue" color. The stone exhibits an unusually intense and strongly colored type of luminescence: Jeffrey Post, Smithsonian curator, [4] Clarity: The clarity was determined to be VS1, with whitish graining present.

The cut was described as being "cushion antique brilliant with a faceted girdle and extra facets on the pavilion.

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Inthe diamond was removed from its setting in order to measure its chemical composition ; after boring a hole one nanometre four-billionths of an inch deep, preliminary results detected the presence of boronhydrogen and possibly nitrogen ; the boron concentration varies from zero to eight parts per million.

Jeffrey Post, the boron may be responsible for causing the blue color of the stones after tests using infrared light measured a spectrum of the gems.

When Associated Press reporter Ron Edmonds was allowed by Smithsonian officials to hold the gem in his hand inhe wrote that the first thought that had come into his mind was: You cradle the Diamonds in general, including the Hope Diamond, are considered to be the hardest natural mineral on the Earthbut because of diamond's crystalline structure, there are weak planes in the bonds which permit jewelers to slice a Hope diamond and, in so doing, to cause it to sparkle by refracting light in different ways.

The Hope Diamond contains trace amounts of boron atoms intermixed with the carbon structure, which results in the rare blue color of the diamond. But the first historical records suggest that Tavernier obtained the stone inpossibly by purchase [13] [1] or by theft. This large stone became known as the Tavernier Blue diamond.

It was a crudely cut triangular shaped stone of carats Les Six Voyages de J.

Hope diamond

Taverniercontains sketches of several large diamonds that he sold to Louis XIV in possibly [10] or ; while the blue diamond is shown among these, Tavernier mentions the mines at "Gani" Kollur as a source of colored diamonds, but made no direct mention of the stone.

Historian Richard Kurin builds a highly speculative case for as the year of acquisition, [27] but the most that can be said with certainty is that Tavernier obtained the blue diamond during one of his five voyages to India between the years and One report suggests he took 25 diamonds to Paris, including the large rock which became the Hope, and sold all of them to King Louis XIV.

According to the theory, during that period Colbertthe King's Finance Minister, regularly sold offices and noble titles for cash, and an outright patent of nobility, according to Wise, was worth approximatelylivres making a total oflivres, a price about half Tavernier's estimate of the gem's true value.

Later English-speaking historians have simply called it the French Blue. The king had the stone set on a cravat -pin.

The diamond became the property of his grandson Louis XVI. One report suggested that the cut was a "butchered job" because it sheared off Previously, the dimensions of the French Blue had been known only from two drawings made in and ; although the model slightly differs from the drawings in some details, these details are identical to features of the Hope Diamond, allowing CAD technology to digitally reconstruct the French Blue around the recut stone.

In a contrasting report, historian Richard Kurin speculated that the "theft" of the French Crown Jewels was in fact engineered by the revolutionary leader Georges Danton as part of a plan to bribe an opposing military commander, Duke Karl Wilhelm of Brunswick.

Although Caroline was the wife of the Prince Regent George later George IV of the United Kingdomshe lived apart from her husband, and financial straits sometimes forced her to quietly sell her own jewels to support her household.

Caroline's nephew, Duke Karl Friedrichwas later known to possess a This smaller diamond's present whereabouts are unknown, and the recent CAD reconstruction of the French Blue fits too tightly around the Hope Diamond to allow for the existence of a sister stone of that size.

United Kingdom[ edit ] A blue diamond with the same shape, size, and color as the Hope Diamond was recorded by John Francillon in the possession of the London diamond merchant Daniel Eliason in Septemberthe earliest point when the history of the Hope Diamond can be definitively fixed, [9] [13] although a second less definitive report claims that the Hope Diamond's "authentic history" can only be traced back to There are conflicting reports about what happened to the diamond during these years.

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Eliason's diamond may have been acquired by George IV of the United Kingdom[10] possibly through Caroline of Brunswick ; [13] however, there is no record of the ownership in the Royal Archives at Windsor, although some secondary evidence exists in the form of contemporary writings and artwork, and George IV tended to mix up the Crown property of the Crown Jewels with family heirlooms and his own personal property.

A source at the Smithsonian suggested there were "several references" suggesting that George had, indeed, owned the diamond. Another report states that the king's debts were "so enormous" that the diamond was probably sold through "private channels".The Hope Diamond is one of the most famous jewels in the world, with ownership records dating back almost four centuries.

Its much-admired rare blue color is due to trace amounts of boron atoms. Weighing carats, its exceptional size has revealed new findings about the formation of gemstones.. The jewel is believed to have originated in India, where the original (larger) stone was.

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Hope diamond

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