{"id":9756,"date":"2021-04-12T12:58:13","date_gmt":"2021-04-12T09:58:13","guid":{"rendered":"https:\/\/drago-met.ru\/?p=9756"},"modified":"2024-03-22T21:44:58","modified_gmt":"2024-03-22T18:44:58","slug":"splav-zolota-i-serebra-istoricheskie-fakty-ob-elektrume-sootnoshenie-tsveta-proby-po-gostu-preimushhestva-splavov-dvuh-dragotsennyh-metallov","status":"publish","type":"post","link":"https:\/\/drago-met.ru\/en\/zoloto\/splav-zolota-i-serebra-historicheskie-fakty-ob-elektrume-sootnoshenie-tsveta-proby-poostu-preimushhestva-splavov-dvuh-dragotsennyh-metallov\/","title":{"rendered":"Alloy of gold and silver: historical facts about electrum, color ratio, GOST, advantages of two precious metals alloys"},"content":{"rendered":"

Electrum - a native mineral or artificially smelted gold alloy<\/a> \u0438 silver<\/a>. It is mined together with other varieties of the precious metal or obtained by melting<\/a>. It has characteristic features, above all its peculiar color greenish<\/a> spectrum.<\/p>\n\n\n\n

Electrum - the first precious metal alloys in ancient Greece. Where were the nuggets and are they in nature now<\/h2>\n\n\n\n

Alloy from gold and silver<\/a> was discovered and used as early as the 3rd millennium BC in ancient Egypt by the pharaohs of the 5th dynasty. It was imported from mines located on the African continent.<\/p>\n\n\n\n

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It was mined in ancient Greece and was widely used to make coins. <\/p>\n<\/blockquote>\n\n\n\n

This is due to the high wear resistance, increased hardness. These qualities are superior to gold. The earliest coins were found on the territory of the ancient kingdom of Lydia, Eastern Greece. It is known that even back then the Greeks knew how to refine silver. Coins contained from 45 to 90 % of gold.<\/p>\n\n\n\n

\"Electrum<\/span>
Electrum is a mineral, a kind of native gold<\/span><\/strong><\/figcaption><\/figure>\n\n\n\n

A rarer alloy than gold. In our country, it is still found in the ore deposits of the Urals and Altai in the form of nuggets up to 0.5 kg., grains and placers. In Turkey, its western provinces, sometimes nuggets are found. They are usually small in size and weigh a little.<\/p>\n\n\n\n

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The peculiarity of electrum as an alloy of gold and silver is its heterogeneous composition: its properties change depending on the percentage of each component.<\/p>\n<\/blockquote>\n\n\n\n

What is the name of the alloy of gold and silver<\/h2>\n\n\n\n

The ancient Greek name of the mineral refers to another type of jewelry material, amber. \u1f24\u03bb\u03b5\u03ba\u03c4\u03c1\u03bf\u03bd (electron) is so named for its characteristic color. The basis, however, is the word \u1f24\u03bb\u03ad\u03ba\u03c4\u03c9\u03c1 (elector) - brilliant. The Greek name corresponds to the Latin electrum.<\/p>\n\n\n\n

Why Electrum is called white or green gold<\/h3>\n\n\n\n

The percentage of electrum components determines different shades: from greenish-yellow to milky-yellow. The more silver, the closer it is to the white color. This led to the description of the alloy with silver as white gold. In Greek it is called \u03bb\u03b5\u03c5\u03ba\u1f78\u03c2 \u03c7\u03c1\u03c5\u03c3\u03cc\u03c2 (leukos chrysos).<\/p>\n\n\n\n

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The modern Russian classification classifies it as a green precious metal.<\/p>\n<\/blockquote>\n\n\n\n

\"Gold<\/span>
Gold-silver alloy has a higher strength<\/span><\/strong><\/figcaption><\/figure>\n\n\n\n

Qualitative characteristics of the alloys<\/h3>\n\n\n\n

Electrum is an alloy that may contain other metals in addition to silver: copper, palladium, platinum. Alloying with these elements increases strength characteristics, increases ductility, lowers melting temperatures, and increases the plasticity of the base material. The alloy of gold and silver contains from 15 to 50% of the latter.<\/p>\n\n\n\n

This accounts for the basic characteristics of electrum:<\/p>\n\n\n\n