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By the start of the 20th century, Laverstoke had become old fashioned and inefficient in comparison to other mills. In a report of 1920, Sir William Portal commented 'economy is a difficult word to introduce into Laverstoke Mills'. Instead, between 1920 and 1922, the company built a new mill, Overton Mill, in the nearby village of Overton. From ...
The Star of Adam is an oval-shaped blue star sapphire, currently the largest star sapphire in the world. [1] [2] [3] It weighs 1,404.49 carats (280.898 g; 9.9084 oz). [4]Prior to its discovery in 2015, the Black Star of Queensland, weighing 733 carats (146.6 g), was the largest star sapphire gem in the world.
Rubicon Technology, Inc. is an American company specializing in sapphire crystal growth and large-diameter sapphire technology. Their improvement to the Kyropoulos technology is known as "ES2", and was developed in their Illinois-based crystal growth facilities.
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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.
Corundum is a crystalline form of aluminium oxide (Al 2 O 3) typically containing traces of iron, titanium, vanadium, and chromium. [3] [4] It is a rock-forming mineral.It is a naturally transparent material, but can have different colors depending on the presence of transition metal impurities in its crystalline structure. [7]
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JumpStart Adventures 4th Grade: Sapphire Falls is a personal computer game released by Knowledge Adventure on December 3, 1999 to replace their earlier JumpStart Adventures 4th Grade: Haunted Island released in 1996.