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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. Asterism (gemology) - Wikipedia

    en.wikipedia.org/wiki/Asterism_(gemology)

    Asterism on the surface of a blue star sapphire. A purple-pink star sapphire displaying asterism in a platinum ring.. An asterism (from Ancient Greek ἀστήρ (astḗr) 'star' and -ism) is a star-shaped concentration of light reflected or refracted from a gemstone.

  5. Crystal healing - Wikipedia

    en.wikipedia.org/wiki/Crystal_healing

    Crystal healing is a pseudoscientific alternative-medicine practice that uses semiprecious stones and crystals such as quartz, agate, amethyst or opal. Despite the common use of the term "crystal", many popular stones used in crystal healing, such as obsidian, are not technically crystals .

  6. 10 Science-Backed Health Benefits of Black Tea - AOL

    www.aol.com/lifestyle/10-science-backed-health...

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  7. Gemstones in the Bible - Wikipedia

    en.wikipedia.org/wiki/Gemstones_in_the_Bible

    Sapphire Sapphire. Sapphire - Greek ὑάκινθος hyakinthos; Vulg. hyacinthus ; the eleventh stone of the foundation of the heavenly city (Revelations 21:20). The genuine sapphire is a beautiful blue hyaline corundum and is composed of nearly pure alumina, its color resulting from the presence of iron oxide. Sapphire was obtained from India.

  8. List of sapphires by size - Wikipedia

    en.wikipedia.org/wiki/List_of_sapphires_by_size

    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: Sri Lanka 422.99 carats (84.598 ...

  9. Surprising Health Benefits of Black Beans, According to ... - AOL

    www.aol.com/lifestyle/surprising-health-benefits...

    Black beans contain a class of antioxidants called anthocyanins that give them their dark color and can help support brain health and lower the risk for heart disease and diabetes, Moore says.