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The Star of Asia is a large, 330 carats (66 g) cabochon-cut star sapphire now in the Smithsonian National Museum of Natural History. It is noted for its significant size and is considered to be one of the largest of its type. Adding to its aesthetic value are its rich blue colour and clear star, formed from three intersecting rutile striations.
Sapphire is a saturated shade of blue, referring to the gemstone of the same name. Sapphire gems most commonly occur in a range of blue shades , although they can come in many different colors. Other names for variations of the color sapphire are blue sapphire or sapphire blue , shown below.
Blue Nile Pear Diamond Solitaire Engagement Ring, 2.75 ct. In addition to its custom designs, the brand offers a selection of ready-to-ship engagement rings, including this pear-shaped solitaire.
The 287–carat Star of Artaban, housed in the National Museum of Natural History, Washington D.C., is an unusually large blue star sapphire. The Star of Artaban is a 287–carat cabochon-cut star sapphire currently located at the Smithsonian National Museum of Natural History. Its origin is somewhat obscure but it is believed to come from Sri ...
In 2016, jeweler Olivia Young of Ouroboros sold a red spinel ring for £6,000 ($7,700). Last year, the client’s insurance company paid out £30,000 ($38,400) to replace it.
Following the successful synthesis of ruby, Verneuil focused his efforts on sapphire. Synthesis of blue sapphire came in 1909, after chemical analyses of sapphire suggested to Verneuil that iron and titanium were the cause of the blue color. Verneuil patented the process of producing synthetic blue sapphire in 1911. [49] [5]: 254–255
A 0.43-carat (0.086 g) teardrop-shaped cornflower blue Yogo sapphire. Sapphires are a color variety of corundum, a crystalline form of aluminium oxide (Al 2 O 3). [14] Corundum is one of the hardest minerals, rating 9 on the Mohs scale. [15] Corundum gems of most colors are called sapphires, except for red ones, which are called rubies. [16]
The Star of India is a 563.35-carat (112.67 g) star sapphire, one of the largest such gems in the world. [1] [a] It is almost flawless and is unusual in that it has stars on both sides of the stone. The greyish-blue gem was mined in Sri Lanka [3] and is housed in the American Museum of Natural History in New York City.
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