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Troy ounce is a traditional unit of gold weight. One-troy-ounce (480 gr; 31 g) samples of germanium, iron, aluminium, rhenium and osmium A Good Delivery silver bar weighing 1,000 troy ounces (83 troy pounds; 31 kg)
Diamagnetism is the property of materials that are repelled by a magnetic field; an applied magnetic field creates an induced magnetic field in them in the opposite direction, causing a repulsive force.
Chrysocolla has a cyan (blue-green) color and is a minor ore of copper, having a hardness of 2.5 to 7.0. It is of secondary origin and forms in the oxidation zones of copper ore bodies. Associated minerals are quartz, limonite, azurite, malachite, cuprite, and other secondary copper minerals.
Both the Roman goddess Libertas and Sun god Sol Invictus ("The Unconquered Sun", pictured) influenced the design of Liberty Enlightening the World.. According to the National Park Service, the idea of a monument presented by the French people to the United States was first proposed by Édouard René de Laboulaye, president of the French Anti-Slavery Society and a prominent and important ...
Arthashastra, written by Chanakya, prime minister to the first Maurya emperor Chandragupta Maurya (c. 340–290 BC), mentions silver coins as rūpyarūpa, other types including gold coins (suvarṇarūpa), copper coins (tāmrarūpa) and lead coins (sīsarūpa) are mentioned [This claim is disputed]. Rūpa means form or shape, example ...
The word vitriol comes from the Latin word vitriolus, meaning "small glass", as those crystals resembled small pieces of colored glass. Oil of vitriol was an old name for concentrated sulfuric acid, which was historically obtained through the dry distillation of vitriols. The name, abbreviated to vitriol, continued to be used for this viscous ...
Because of its status as the color of Roman emperors, monarchs and princes, purple and violet are often associated with luxury. Certain luxury goods, such as watches and jewelry, are often placed in boxes lined with violet velvet, since violet is the complementary color of yellow and shows gold to best advantage.
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