|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 98.6 carat table cut Bismarck Sapphire is mounted in a pendant surrounded by baguette-cut diamonds.||
The Dom Pedro Aquamarine
|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.
Pink pear shape diamond weighing 2.90 carats.
The 58.19-carat Maharani Cat’s Eye from Sri Lanka. Chrysoberyl. The optical phenomenon of chatoyancy is caused by the reflection of light off inclusions of fine, needle-like crystals, usually rutile.
The Victoria-Transvaal Diamond was cut from a 240-carat rough stone found at the Premier Mine in Transvaal, South Africa, in 1951. The diamond is 67.89 carats, is a pear-shaped brilliant cut, and has 116 facets.
|The Petersen Tanzanite Brooch. Pair of matched tanzanite gems about 30 carats. The brooch was designed by Harry Winston in 1991 and 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.