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  2. Art valuation - Wikipedia

    en.wikipedia.org/wiki/Art_valuation

    The newspaper attempted to calculate the value of the many artworks at issue in the case by determining a per-square-inch price based on each piece's value divided by its dimension, to end up with a per-square-inch price to apply to the amount of wall space the businesslike litigant wanted to cover with the available art. [18]

  3. Sapphire and Crystals - Wikipedia

    en.wikipedia.org/wiki/Sapphire_and_Crystals

    Sapphire and Crystals emerged during a period of many other feminist groups and artist collectives in Chicago during the 1970s and 1980s. The early planning for Sapphire and Crystals began with conversations between Marva Lee Pitchford-Jolly and Felicia Grant Preston in 1986 as response to the dissolution of the artists' former collective, Mud People's Black Women's Resource Sharing Workshop.

  4. Queen Marie of Romania Sapphire - Wikipedia

    en.wikipedia.org/.../Queen_Marie_of_Romania_Sapphire

    Queen Marie wearing the sapphire as a pendant at her coronation, 15 October 1922. Cartier first mentioned this 478.68 carat (95.736 g) Cornflower blue Ceylon sapphire in 1913 when it was used with seven other sapphires to make a diamond and sapphire sautoir. The design was later altered to be all diamond, save this gemstone, to make it stand out.

  5. Sapphire - Wikipedia

    en.wikipedia.org/wiki/Sapphire

    The 182-carat Star of Bombay, mined in Sri Lanka and located in the National Museum of Natural History in Washington, D.C., is another example of a large blue star sapphire. The value of a star sapphire depends not only on the weight of the stone, but also the body color, visibility, and intensity of the asterism.

  6. Yogo sapphire - Wikipedia

    en.wikipedia.org/wiki/Yogo_sapphire

    "Yogo sapphire" is the preferred term for gems found in the Yogo Gulch, whereas "Montana sapphire" generally refers to gems found in other Montana locations. More gem-quality sapphires are produced in Montana than anywhere else in North America. Sapphires were first discovered in Montana in 1865, in alluvium along the Missouri River. Finds in ...

  7. James J. Hill Sapphire - Wikipedia

    en.wikipedia.org/wiki/James_J._Hill_Sapphire

    This later estimate was acknowledged by insiders as a "low-ball estimate," however. [1] The sapphire's value was later upped by Rahul Kadakia, senior vice president and head of jewelry at Christie's America, to approximately $1 million. [5] [3] It was sold as Lot No. 261, and the auctioneer was François Curiel.

  8. Engagement ring - Wikipedia

    en.wikipedia.org/wiki/Engagement_ring

    Like all jewellery, the price for an engagement ring varies considerably depending on the materials used: the design of the ring, whether it includes a gemstone, the value of any gemstone, and the seller. The price of the gemstones, if any, in the ring depends on the type and quality of the gem.

  9. List of sapphires by size - Wikipedia

    en.wikipedia.org/wiki/List_of_sapphires_by_size

    Sapphires are a precious gemstone, a variety of the mineral corundum, consisting of aluminum oxide (α-Al 2 O 3) with trace amounts of elements such as iron, titanium, chromium, copper, or magnesium. It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors; "parti sapphires" show two or more colors.

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