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2. James J. Hill Sapphire - Wikipedia

   en.wikipedia.org/wiki/James_J._Hill_Sapphire

   The unnamed Kashmir sapphire is a 22.66 carat (4.532 g) gem. It is known for its former owner, railroad executive James J. Hill, who purchased it in 1886 for his wife as part of a diamond- and sapphire-adorned necklace.

3. Sapphire - Wikipedia

   en.wikipedia.org/wiki/Sapphire

   A star sapphire is a type of sapphire that exhibits a star-like phenomenon known as asterism; red stones are known as "star rubies". Star sapphires contain intersecting needle-like inclusions following the underlying crystal structure that causes the appearance of a six-rayed "star"-shaped pattern when viewed with a single overhead light source.

4. Asterism (gemology) - Wikipedia

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

   The star-effect may be also caused by the inclusions of hematite. In black star sapphire hematite needles formed parallel to the faces of the second order prism produce asterism. Some star sapphires from Thailand contain both hematite and rutile needles forming a 12-ray star. [3] Star-stones were formerly regarded with much superstition. [1]

5. Star sapphire - Wikipedia

   en.wikipedia.org/wiki/Star_sapphire

   Star sapphire or Star Sapphire may refer to: Star sapphire, a type of sapphire gemstone that exhibits a star-like reflection of light (an asterism) The Armstrong Siddeley Star Sapphire, a British car manufactured from 1958 to 1960; Star Sapphire (DC Comics character), the name of several fictional supervillains in DC Comics publications

6. 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 ...

7. Jewellery - Wikipedia

   en.wikipedia.org/wiki/Jewellery

   As of 2022, the global jewelry market was valued at approximately $270 billion and is projected to grow to over $330 billion by 2026. In 2022, the leading countries in the jewelry and watch market revenue were China, India, and the United States. [85] The Asia Pacific region dominated the jewelry market with a market share of 39.28% in 2024. [86]