L> DiamondDiamond

Diamond is a crystalline type of carbon which has actually a density of has a density of 3.51 gm/cm3 compared to 2.26 gm/cm3 in the graphite form. Imperfectly developed crystalline creates of diamond are dubbed bort and black diamond. They space slightly less thick than diamond and also are somewhat tougher and harder. Castle are used for diamond drills and abrasives.

While diamond is the hardest substance, rating a 10 top top the hardness scale, numerous carbon compounds called carbides rival its hardness. Boron carbide, B4C, is the hardest next to diamond yet several the the steel carbides are extremelyhard and also find applications as cutting edges on high rate tools.

The particularly "fire" that a diamond gem is partly attributable to it"s high index of refraction, which in ~ n=2.417 is greater than any kind of common mineral other than zircon.

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after Kittel

This crystalline form is dubbed the "diamond lattice", and it occurs in other substances (e.g., silicon). That is a framework which Ashcroft and also Mermin contact "two interpenetrating face-centered cubic" primitive lattices. The lines between carbon atoms in the lattice illustration indicate nearest-neighbor bonds.

This is the Hazen Diamond Necklace. The 325 diamonds in this platinum necklace weigh a full of 131.4 carats. It was designed by take care of Winston, Inc. And a gift to the Smithsonian in 1979 by Lita Annenberg Hazen. Every these diamonds are on display in the Smithsonian Museum of organic History.

The major sources of diamonds room the Republic of south Africa and Tanzania. Many diamonds are uncovered in a form of volcano rock referred to as kimberlite, and in details in structures referred to as "kimberlite pipes".

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Necklace v the Victoria-Transvaal Diamond at 67.89 carats.

"The Victoria-Transvaal is a 67.89-carat, brownish-yellow pear shaped stone. The was cut from a 240-carat decision that was uncovered in the Transvaal, south Africa. The very first cutting developed a 75-carat 116-facet rock that measure up 1 x 1?/8 inches; a recutting retained the same length and also width, but reduced the depth to much better proportions, making it more brilliant. The diamond has been featured in number of Hollywood films, including a Tarzan episode from 1952 title Tarzan"s Savage Fury, and in top exhibitions in the joined States and Canada.The necklace to be designed through Baumgold Brothers, Inc, and consists the a yellow gold chain with 66 ring brilliant-cut diamonds, fringed v ten fall motifs, each collection with 2 marquise-cut diamonds, a pear-shaped diamond, and a small round brilliant-cut diamond (the total weight of the 106 diamonds is around 45 carats). "The necklace to be donated by Leonard and Victoria Wilkinson in 1977 to the Smithsonian Institute, Washington D.C.Source: renowned diamonds

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Thompson DiamondsThe brooch is 36.73 carats and also the earclips room 39.58 carats. The three cognac-colored, pear-shaped diamonds wer reduced in 1956 native a solitary 264-carat crystal. Nearly 20 carats the pear-shaped white diamonds accentuate the matching set.

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The Marie Antoinette diamonds

The large diamonds in these modern-day earrings to be once collection in a lot older pair. Follow to sworn documents, the initial earrings to be owned by Marie Antoinette, the queen that France that was guillootined in 1793 throughout the French Revolution.

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The earrings were said to be a gift from she husband, King louis XVI. Follow to one legend, she had them through her when she was arrested fleeing the French transformation in 1791. Grand Duchess Tatiana Yousupoff of Russia later gained the earrings. They continued to be within her household until 1928.

The diamond automatically right is the Oppenheimer Diamond indigenous Dutoitspan mine, Kimberley, southern Africa. The is remarkable not only for the size, 253.7 carats, but additionally because it has actually survived uncut. Its double pyramid or octahedral shap is typical of countless diamond crystals.

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The diamond over right is the "Portuguese Diamond". That is of dimension 127.01 carats and also is the unknown origin. It is the largest reduced diamond in the Smithsonian collection. The was when owned by Peggy Hopkins Joyce, an actress in the Ziegfeld Follies. Despite its name, it has no documented link with Portugal. The 2 diamonds above are shown at the exact same scale.
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This is called the "Mystery Diamond Necklace". The mystery is not only that the beginning of the necklace is unknown, however the reality that the 10-15 carat diamond looks much larger. The cleverly designed setting creates the illusion that this wafer-thin diamond is five or 6 times heavier than it is. It to be a gift come the Smithsonian through Lillian Turner in 1998.

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This 61.3 carat diamond brooch and also the 22 carat ringdent space of unknown origin. The brooch is of 18-carat gold and contains 71 diamonds ranging in load from 0.3 to 2.5 carats. The colors room natural. The yellow emerald-cut diamond is set in a ringdent design to be worn as a pendant or ring.

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At left is a 28.3 carat marquise-cut diamond ring. At appropriate is the 16.72 carat Pearson Diamond from southern Africa. The round, brilliant reduced enhances the superior features of this practically colorless, flawless diamond.
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Blue Diamond

The Blue love Diamond Ring has actually an particularly 30.62 carat blue diamond from south Africa. The is 2 thirds the size of the hope Diamond.

Pink Diamond

This is a 2.9 carat pink diamond, amongst the rarest that diamond colors. The cause of the pink shade is not known.

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This is a bigger view of the Blue love Diamond Ring contrasted to the famed Hope Diamond. The was exciting to note that the expect Diamond is displayed unmounted in this 2010 image contrasted to 2003 as soon as it was presented in a necklace. The background of the expect diamond might be found on the Smithsonian website.

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The hope Diamond is 45.52 carats and also perhaps the most renowned diamond in the world.

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A yellow diamond compared to a necklace of virtually colorless gems.

Mindat: Diamond

Minerals
Measuring in carats
IndexReferencesKittelAshcroft & Mermin
lifwynnfoundation.org*****GeophysicsR Nave
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