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  2. Black Star sapphire - Wikipedia

    en.wikipedia.org/wiki/Black_Star_sapphire

    Black star sapphire, also known as 'natural star sapphire' is a type of corundum (aluminum oxide). It is usually cut into a dome shape to show a star feature. If it is cut with a flat or almost flat face, then a golden colour is revealed. The chemical composition and features for black star were analyzed in the Journal of Gemmology. [citation ...

  3. Black Star of Queensland - Wikipedia

    en.wikipedia.org/wiki/Black_Star_of_Queensland

    The Black Star of Queensland, also known as the Brimstone of Queensland, named after its nature and place of origin, is a 733-carat (146.6 g) black sapphire, and was the world's largest gem quality star sapphire until The Star of Adam was discovered. The Black Star sapphire is an oval-shaped gemstone cut as a cabochon like all other star ...

  4. List of sapphires by size - Wikipedia

    en.wikipedia.org/wiki/List_of_sapphires_by_size

    Star Blue Anonymous owner [3] Black Star of Queensland: Australia 1938 733 carats (146.6 g) Star Black Anonymous owner [4] Star of India: Sri Lanka 563.4 carats (112.68 g) Star Blue-gray American Museum of Natural History, New York [5] Queen Marie of Romania: Sri Lanka 478.68 carats (95.736 g) Cushion Blue Anonymous owner [6] Logan Sapphire ...

  5. Move over diamonds, these little-known gemstones are heating up

    www.aol.com/move-over-diamonds-little-known...

    Lily Gabriella's "Memphis Deco Pin," is crafted in 18-carat rose gold and platinum and features a 7.34 carat grey spinel cushion, princess cut pink sapphires and custom cut lapis lazuli (price on ...

  6. Star of India (gem) - Wikipedia

    en.wikipedia.org/wiki/Star_of_India_(gem)

    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.

  7. Sapphire - Wikipedia

    en.wikipedia.org/wiki/Sapphire

    The Black Star of Queensland, the second largest star sapphire in the world, weighs 733 carats. [18] The Star of India mined in Sri Lanka and weighing 563.4 carats is thought to be the third-largest star sapphire, and is currently on display at the American Museum of Natural History in New York City.

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