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This alchemical symbol for platinum was made by joining the symbols of silver and gold . Antonio de Ulloa is credited in European history with the discovery of platinum. In 1735, Antonio de Ulloa and Jorge Juan y Santacilia saw Native Americans mining platinum while the Spaniards were travelling through Colombia and Peru for eight years. Ulloa ...
Additionally, some alchemists and astrologers believed there was an association, sometimes called a rulership, between days of the week, the alchemical metals, and the planets that were said to hold "dominion" over them. [27] [28] There was some early variation, but the most common associations since antiquity are the following:
The Golden Wand of Medicine: A History of the Caduceus Symbol in Medicine. Contributions in Medical Studies, 35. New York: Greenwood Press. ISBN 0-313-28023-1. Holmyard, Eric J. (1957). Alchemy. Harmondsworth: Penguin Books. OCLC 2080637. Reutter de Rosemont, Louis (1931). Histoire de la pharmacie a travers les ages. Vol. II.
The most notable examples are the Platinum cat, [8] and Platinum Noble by the Isle of Man, Canadian Platinum Maple Leaf, [9] Chinese Platinum Panda and Australian Platinum Koala. [citation needed] The minting of a trillion-dollar platinum coin was proposed as a solution to the 2023 United States debt-ceiling crisis.
Other precious metals include the platinum group metals: ruthenium, rhodium, palladium, osmium, iridium, and platinum, of which platinum is the most widely traded. [1] The demand for precious metals is driven not only by their practical use but also by their role as investments and a store of value. Historically, precious metals have commanded ...
The Black Sea deluge is a hypothesized catastrophic rise in the level of the Black Sea c. 5600 BC due to waters from the Mediterranean Sea breaching a sill in the Bosporus Strait. The hypothesis was headlined when The New York Times published it in December 1996, shortly before it was published in an academic journal . [ 89 ]
Some explanations of Black Friday claim that the holiday references a 19th-century term for the day after Thanksgiving, during which plantation owners could buy slaves at discount prices.
A small box from the burial of the Pharaoh Shepenupet II (died around 650 BC) was found to be decorated with gold-platinum hieroglyphics, [36] but the Egyptians may not have recognised that there was platinum in their gold. [37] [38] First European description of a metal found in South American gold was in 1557 by Julius Caesar Scaliger.