Saturday, 11 February 2017

Gems of the Smithsonian

The Bismarck Sapphire Necklace is a sapphire necklace designed by Cartier in 1935.

It is named after Countess Mona von Bismarck, who donated the piece to the Smithsonian in 1967. The sapphire was mined in Sri Lanka in 1926. The necklace consists of a single chain of platinum links connected by pairs of round brilliant cut diamonds. The 98.6 carat table cut Bismarck Sapphire is mounted in a pendant at the front of the necklace, surrounded by baguette-cut diamonds.

The Portuguese Diamond at 127.01 carats is the largest faceted diamond in the National Gem Collection.
The Carmen Lúcia Ruby is a 23.1-carat Burmese ruby set in a platinum ring with diamonds. It was donated by Peter Buck in memory of his wife Carmen Lúcia. The stone was mined from the Mogok region of Burma in the 1930s.

The Blue Heart Diamond was found at the Premier Mine, South Africa in 1908. This 30.62 carat heart-shaped, brilliant cut blue diamond was faceted in 1910 from a 100.5 carat piece of rough.

The DeYoung Red Diamond is one of the largest known natural fancy dark red diamonds. It is a modified round brilliant cut VS-2 diamond of 5.03 carats. The diamond was acquired by S. Sydney DeYoung  and identified, incorrectly, as a garnet. It was gifted to the National Gem Collection in 1987.
This 21.04-carat Colombian emerald was once set in a ring worn by Mexico’s ill-fated emperor, Ferdinand Maximilian Joseph. An Austrian archduke crowned emperor of Mexico in 1864, he was executed during an uprising three years later.

The Dom Pedro Aquamarine
The Hooker Emerald is 75.47 carats. It was once the property of Abdul Hamid II, Sultan of the Ottoman Empire (1876-1909) who wore it in his belt buckle. Tiffany & Co. purchased the emerald at auction in 1911.

The stone originated from Colombia and was probably shipped to Europe by Spanish conquistadores in the 16th or 17th century. Mrs. Janet Annenberg Hooker donated it to the Smithsonian 1977.
The 58.19-carat Maharani Cat’s Eye from Sri Lanka. The optical phenomenon of chatoyancy can be displayed by many gemstones, but the most popular and highly prized is that of the mineral chrysoberyl.

The “eye” that the stone displays when it is cut cabochon is caused by the reflection of light off numerous parallel inclusions of fine, needle-like crystals, commonly of the mineral rutile.

Hope Diamond

Heart-shaped brooch has a 96-carat amethyst surrounded by diamonds.

The Hall Sapphire Necklace, designed by Harry Winston, features 36 cushion-cut sapphires from Sri Lanka, totaling 195 carats, set in platinum accented by 435 pear-shaped and round brilliant-cut diamonds, totaling 83.75 carats.

These two large, pear-shaped diamonds weigh 14.25 and 20.34 carats are set in earrings that belonged to Marie Antoinette, the Queen of France who was guillotined in 1793 during the French Revolution.
The Petersen Tanzanite Brooch. Pair of matched tanzanite gems about 30 carats. The floral platinum brooch, designed by Harry Winston in 1991, has 24 carats of diamonds. The tanzanite “flowers” can be detached and worn as earrings. The Petersen Tanzanite Brooch was gifted to the National Gem Collection in 2002.

The Sherman Diamond is one of five pendants from a diamond necklace. The necklace was a gift from the khedive of Egypt to Civil War General William Sherman for his daughter’s wedding in 1874. The necklace was divided among his three daughters. The pendant has an 8.52-carat pear shaped diamond surrounded by 17 round diamonds.

Platinum bracelet contains 31 antique-cut Burmese rubies. It was donated to the Smithsonian in 1961

The Cullinan Blue Diamond Necklace was presented by Thomas Cullinan, then chairman of the Premier Mine in South Africa, to his wife Annie, about 100 years ago. The necklace was donated to the National Gem Collection in 2010.

The Hazen Diamond Necklace was designed by Harry Winston. The necklace is made of platinum and contains 325 diamonds that have a total weight of approximately 131.43 carats. Mrs. Lita Annenberg Hazen donated the necklace to the Smithsonian in 1979

Pink pear shape diamond weighing 2.90 carats.