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1784 In Massachusetts
Events January–March * January 6 – Treaty of Constantinople: The Ottoman Empire agrees to Russian Empire, Russia's annexation of the Crimean Peninsula, Crimea. * January 14 – The Congress of the United States ratifies the Treaty of Paris (1783), Treaty of Paris with Kingdom of Great Britain, Great Britain to end the American Revolution, with the signature of President of the Continental Congress, President of Congress Thomas Mifflin.''Harper's Encyclopaedia of United States History from 458 A. D. to 1909'', ed. by Benson John Lossing and, Woodrow Wilson (Harper & Brothers, 1910) p167 * January 15 – Henry Cavendish's paper to the Royal Society of London, ''Experiments on Air'', reveals the composition of water (molecule), water. * February 24 – The Captivity of Mangalorean Catholics at Seringapatam begins. * February 28 – John Wesley ordains ministers for the Methodist Church in the United States. * March 1 – The Confederation Cong ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emerald Buddha, August 2012, Bangkok
Emerald is a gemstone and a variety of the mineral beryl (Be3Al2(SiO3)6) colored green by trace amounts of chromium or sometimes vanadium.Hurlbut, Cornelius S. Jr. and Kammerling, Robert C. (1991) ''Gemology'', John Wiley & Sons, New York, p. 203, . Beryl has a Hardness (materials science), hardness of 7.5–8 on the Mohs scale of mineral hardness, Mohs scale. Most emeralds are highly inclusion (mineral), included, so their toughness (resistance to breakage) is classified as generally poor. Emerald is a cyclosilicate. Etymology The word "emerald" is derived (via fro, esmeraude and enm, emeraude), from Vulgar Latin: ''esmaralda''/''esmaraldus'', a variant of Latin ''smaragdus'', which was a via grc, σμάραγδος (smáragdos; "green gem") from a Semitic language. According to Webster's Dictionary the term emerald was first used in the 14th century. Properties determining value Emeralds, like all colored gemstones, are graded using four basic parameters–the four ''C' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
