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About: Yogo sapphire

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Yogo sapphires are blue sapphires, a colored variety of corundum, found in Montana, primarily in Yogo Gulch (part of the Little Belt Mountains) in Judith Basin County, Montana. Yogo sapphires are typically cornflower blue, a result of trace amounts of iron and titanium. They have high uniform clarity and maintain their brilliance under artificial light. Because Yogo sapphires occur within a vertically dipping resistive igneous dike, mining efforts have been sporadic and rarely profitable. It is estimated that at least 28 million carats (5.6 t or 5.5 long tons or 6.2 short tons) of Yogo sapphires are still in the ground. Jewelry containing Yogo sapphires was given to First Ladies Florence Harding and Bess Truman; in addition, many gems were sold in Europe, though promoters' claims that Yogo

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  • Yogo sapphires (kurz Yogos) sind Saphire aus der Schlucht Yogo Gulch in Montana. Die Schlucht liegt in den in den Rocky Mountains, im Judith Basin County. Das Land gehörte früher den Piegan (Blackfeet). Saphire sind Varietäten des Minerals Korund. Die meisten Yogos haben die für Saphire erwünschte tiefblaue Farbe, die sie ihrer geologischen Entstehung verdanken. Nach Einschätzung vieler Gemmologen, die diese Farbe assoziativ als „Kornblumenblau“ („cornflower blue“) bezeichnen, gehören sie zu den hochwertigsten Saphiren der Welt. Sie zeichnen sich durch gleichmäßige Transparenz aus und glänzen auch bei künstlichem Licht. Da die Saphire im Yogo Gulch in einem vertikal geneigten magmatischen Dyke vorkommen, war ihr Abbau sporadisch und selten profitabel. Es wird geschätzt, dass noch mindestens 28 Millionen Karat (5,6 t) Yogos im Boden zu finden sind. Schmuckstücke, die Yogos enthalten, wurden den First Ladies Florence Harding und Bess Truman geschenkt. Etliche Yogo sapphires sind Teil der Sammlungen der Smithsonian Institution. (de)
  • Los zafiros Yogo son una variedad de corindón que solo se encuentran en , parte de las montañas , Montana, Estados Unidos.Los Zafiro Yogos suelen ser azul aciano, resultado de trazas de hierro y titanio. Tienen una gran claridad uniforme y mantienen su brillo bajo la luz artificial. Debido a que los zafiros Yogo se encuentran dentro de un dique vertical de inmersión ígnea resistente, los esfuerzos de la minería han sido esporádicas y raramente rentables. Se estima que al menos 28 millones de quilates de Yogos se encuentran todavía en el suelo. Hoy en día, varios zafiros Yogo son parte de la colección de la joya del Instituto Smithsoniano Los Zafiros Yogo no fueron inicialmente reconocidos ni valorados. El oro fue descubierto en Yogo Creek (Estero Yogo) en 1866, y aunque algunas "piedras azules" se observaron junto con el oro en el aluvión para 1878, no fue hasta 1894 que las "piedras azules" fueron reconocidos como zafiros. * Datos: Q2224035 * Multimedia: Yogo mine and sapphires / Q2224035 (es)
  • Yogo sapphires are blue sapphires, a colored variety of corundum, found in Montana, primarily in Yogo Gulch (part of the Little Belt Mountains) in Judith Basin County, Montana. Yogo sapphires are typically cornflower blue, a result of trace amounts of iron and titanium. They have high uniform clarity and maintain their brilliance under artificial light. Because Yogo sapphires occur within a vertically dipping resistive igneous dike, mining efforts have been sporadic and rarely profitable. It is estimated that at least 28 million carats (5.6 t or 5.5 long tons or 6.2 short tons) of Yogo sapphires are still in the ground. Jewelry containing Yogo sapphires was given to First Ladies Florence Harding and Bess Truman; in addition, many gems were sold in Europe, though promoters' claims that Yogo sapphires are in the crown jewels of England or the engagement ring of Princess Diana are dubious. Today, several Yogo sapphires are part of the Smithsonian Institution's gem collection. Yogo sapphires were not initially recognized or valued. Gold was discovered at Yogo Creek in 1866, and though "blue pebbles" were noticed alongside gold in the stream alluvium by 1878, it was not until 1894 that the "blue pebbles" were recognized as sapphires. Sapphire mining began in 1895 after a local rancher named Jake Hoover sent a cigar box of gems he had collected to an assay office, which in turn sent them to Tiffany's in New York, where an appraiser pronounced them "the finest precious gemstones ever found in the United States". Hoover then purchased the original mother lode from a sheepherder, later selling it to other investors. This became the highly profitable "English Mine", which flourished from 1899 until the 1920s. A second operation, the "American Mine", was owned by a series of investors in the western section of the Yogo dike, but was less profitable and bought out by the syndicate that owned the English Mine. In 1984, a third set of claims, known as the Vortex mine, opened. The term "Yogo sapphire" is the preferred wording for gems found in the Yogo Gulch, whereas "Montana sapphire" generally refers to gems found in other Montana locations. More gem-quality sapphires are produced in Montana than anywhere else in North America. Sapphires were first discovered in Montana in 1865, in alluvium along the Missouri River. Finds in other locations in the western half of the state occurred in 1889, 1892, and 1894. The Rock Creek location, near Phillipsburg, is the most productive site in Montana, and its gems inspired the name of the nearby Sapphire Mountains. In 1969, the sapphire was co-designated along with the agate as Montana's state gemstones. In the early 1980s, Intergem Limited, which controlled most of the Yogo sapphire mining at the time, rocked the gem world by marketing Yogo sapphires as the world's only guaranteed "untreated" sapphire, exposing a practice of the time wherein 95 percent of all the world's sapphires were heat-treated to enhance their natural color. Although Intergem went out of business, the gems it mined appeared on the market through the 1990s because the company had paid its salesmen in sapphires during its financial demise. Citibank had obtained a large stock of Yogo sapphires as a result of Intergem's collapse, and after keeping them in a vault for nearly a decade, sold its collection in 1994 to a Montana jeweler. Mining activity today is largely confined to hobby miners in the area; the major mines are currently inactive. (en)
  • Safiras Yogo é uma variedade de corindo encontrado apenas em Yogo Gulch, parte das montanhas Little Belt em Judith Basin County, Montana, Estados Unidos, na terra que foi habitado pelo povo Piegan Blackfeet. Yogos são tipicamente cornflower azul, resultado de pequenas quantidades de ferro e titânio. Eles têm alta clareza uniforme e manter seu brilho sob a luz artificial. Porque safiras Yogo ocorrer dentro de um dique resistiva mergulhando verticalmente ígnea, os esforços de mineração têm sido esporádica e raramente rentável. Estima-se que pelo menos 28 milhões de quilates (5,6 t ou 5,5 toneladas longas ou 6,2 toneladas curtas) de Yogos ainda estão no chão. Jóias contendo Yogos foi dado a First Ladies Florence Harding and Bess Truman; além disso, muitas jóias foram vendidas na Europa, apesar de alegações dos promotores que Yogos estão nas jóias da coroa da Inglaterra ou o anel de noivado da princesa Diana são duvidosos. Hoje, várias safiras Yogo fazem parte da coleção de pedras preciosas do Instituto Smithsonian. (pt)
  • Yogosafirer är blå ädelstenar av mineralet korund och är en av de mest uppskattade ädelstenarna. Yogosafirer är en varietet av safirer, som finns endast i Yogo Gulch, i Little Belt Mountains i Judith Basin County, Montana, USA, på mark som en gång beboddes av svartfotsindianer. Den mest värdefulla färgen hos safiren är den blåklintsblå färgen. Yogosafirer är vanligtvis kornblå, ett resultat av spårmängder av järn och titan. De har hög enhetlig klarhet och behåller sin briljans under artificiellt ljus. (sv)
  • Yogo蓝宝石（约戈蓝宝石、优戈蓝宝石）是只有在曾经居住的美国蒙大拿州朱迪斯盆地县的Yogo峡谷才能找到的一种刚玉。Yogo蓝宝石通常呈矢车菊蓝色，这是因为其中含有微量铁和钛。这种宝石清澈均匀，在人造光下也能保持闪耀。由于Yogo蓝宝石出现在垂直的火成岩岩脉中，盈利微薄的开采只零星进行。据估计，至少有28万克拉(5.6 t或5.5 long ton或6.2 short ton)Yogo蓝宝石在地下。弗洛伦斯·哈定和贝丝·杜鲁门两位第一夫人的宝石中有Yogo蓝宝石。此外，尽管促销员声称英格兰和戴安娜王妃的订婚戒指中有Yogo蓝宝石并不可信，但还是有很多Yogo蓝宝石在欧洲出售。如今，史密森尼学会收藏了一些Yogo蓝宝石。 Yogo蓝宝石最初并未被承认或重视。尽管1866年在Yogo溪发现了黄金，并且到1878年有人在河流冲积层中的黄金旁边发现了“蓝色鹅卵石”，但直到1894年“蓝色鹅卵石”才被认定为蓝宝石。一个叫Jake Hoover的当地农场主把他收集的一雪茄盒宝石送到检验局，转而被送到纽约蒂芙尼公司，那里一名鉴定师断言宝石是“在美国发现的最优秀的珍宝”，蓝宝石的开采工作在这之后的1895年开始。接着Hoover从一个牧羊人那里将原来的买了下来，不久又卖给了其他投资者。这成为了高利润的“英国矿”，从1899年到20世纪20年代一直很兴旺。接下来开采的“美国矿”是由Yogo岩脉西部的投资者拥有的，但利润较少，并且被拥有英国矿的企业买断。1984年，叫Vortex mine的第三组申请开工了。 术语“Yogo蓝宝石”是在Yogo峡谷发现的宝石的首选措辞，而“蒙大拿蓝宝石”通常是指在蒙大拿其他地区找到的宝石。蒙大拿产的宝石级蓝宝石比北美洲其他任何地方都多。蒙大拿1865年在密苏里河河岸的冲击层中第一次发现蓝宝石。1889、1892和1894年在蒙大拿州西半部的其他地区也有所发现。菲利普附近的Rock Creek在蒙大拿州产量最高，而且这些宝石还激发了对附近（蓝宝石山群）的命名的灵感。1969年，蒙大拿蓝宝石和玛瑙同时被指定为蒙大拿的。 20世纪80年代初，控制了绝大多数Yogo蓝宝石开采的Intergem有限公司通过将Yogo蓝宝石作为世界上唯一保证“未经处理”的蓝宝石来销售而震撼了宝石界，同时也揭露出了当时的习惯做法，也就是世界上95%的蓝宝石都经过热处理来使它们的天然色深一些。尽管Intergem后来倒闭了，但20世纪90年代它开采的蓝宝石一直出现在市场上，因为该公司在财务转让期间用蓝宝石来支付其销售人员的薪水。由于Intergem倒闭，花旗银行获得了其Yogo蓝宝石的大量现货,并在保险柜中保存了近十年，然后在1994年将这些存货卖给了一个蒙大拿的珠宝商。目前的开采基本只有该地区的采矿爱好者在进行，且主矿没有在开采。 (zh)
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  • A cornflower blue Yogo sapphire (en)
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  • A cornflower blue Yogo sapphire (en)
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  • Yogosafirer är blå ädelstenar av mineralet korund och är en av de mest uppskattade ädelstenarna. Yogosafirer är en varietet av safirer, som finns endast i Yogo Gulch, i Little Belt Mountains i Judith Basin County, Montana, USA, på mark som en gång beboddes av svartfotsindianer. Den mest värdefulla färgen hos safiren är den blåklintsblå färgen. Yogosafirer är vanligtvis kornblå, ett resultat av spårmängder av järn och titan. De har hög enhetlig klarhet och behåller sin briljans under artificiellt ljus. (sv)
  • Yogo sapphires (kurz Yogos) sind Saphire aus der Schlucht Yogo Gulch in Montana. Die Schlucht liegt in den in den Rocky Mountains, im Judith Basin County. Das Land gehörte früher den Piegan (Blackfeet). (de)
  • Los zafiros Yogo son una variedad de corindón que solo se encuentran en , parte de las montañas , Montana, Estados Unidos.Los Zafiro Yogos suelen ser azul aciano, resultado de trazas de hierro y titanio. Tienen una gran claridad uniforme y mantienen su brillo bajo la luz artificial. Debido a que los zafiros Yogo se encuentran dentro de un dique vertical de inmersión ígnea resistente, los esfuerzos de la minería han sido esporádicas y raramente rentables. Se estima que al menos 28 millones de quilates de Yogos se encuentran todavía en el suelo. Hoy en día, varios zafiros Yogo son parte de la colección de la joya del Instituto Smithsoniano (es)
  • Yogo sapphires are blue sapphires, a colored variety of corundum, found in Montana, primarily in Yogo Gulch (part of the Little Belt Mountains) in Judith Basin County, Montana. Yogo sapphires are typically cornflower blue, a result of trace amounts of iron and titanium. They have high uniform clarity and maintain their brilliance under artificial light. Because Yogo sapphires occur within a vertically dipping resistive igneous dike, mining efforts have been sporadic and rarely profitable. It is estimated that at least 28 million carats (5.6 t or 5.5 long tons or 6.2 short tons) of Yogo sapphires are still in the ground. Jewelry containing Yogo sapphires was given to First Ladies Florence Harding and Bess Truman; in addition, many gems were sold in Europe, though promoters' claims that Yogo (en)
  • Safiras Yogo é uma variedade de corindo encontrado apenas em Yogo Gulch, parte das montanhas Little Belt em Judith Basin County, Montana, Estados Unidos, na terra que foi habitado pelo povo Piegan Blackfeet. Yogos são tipicamente cornflower azul, resultado de pequenas quantidades de ferro e titânio. Eles têm alta clareza uniforme e manter seu brilho sob a luz artificial. Porque safiras Yogo ocorrer dentro de um dique resistiva mergulhando verticalmente ígnea, os esforços de mineração têm sido esporádica e raramente rentável. Estima-se que pelo menos 28 milhões de quilates (5,6 t ou 5,5 toneladas longas ou 6,2 toneladas curtas) de Yogos ainda estão no chão. Jóias contendo Yogos foi dado a First Ladies Florence Harding and Bess Truman; além disso, muitas jóias foram vendidas na Europa, apesa (pt)
  • Yogo蓝宝石（约戈蓝宝石、优戈蓝宝石）是只有在曾经居住的美国蒙大拿州朱迪斯盆地县的Yogo峡谷才能找到的一种刚玉。Yogo蓝宝石通常呈矢车菊蓝色，这是因为其中含有微量铁和钛。这种宝石清澈均匀，在人造光下也能保持闪耀。由于Yogo蓝宝石出现在垂直的火成岩岩脉中，盈利微薄的开采只零星进行。据估计，至少有28万克拉(5.6 t或5.5 long ton或6.2 short ton)Yogo蓝宝石在地下。弗洛伦斯·哈定和贝丝·杜鲁门两位第一夫人的宝石中有Yogo蓝宝石。此外，尽管促销员声称英格兰和戴安娜王妃的订婚戒指中有Yogo蓝宝石并不可信，但还是有很多Yogo蓝宝石在欧洲出售。如今，史密森尼学会收藏了一些Yogo蓝宝石。 术语“Yogo蓝宝石”是在Yogo峡谷发现的宝石的首选措辞，而“蒙大拿蓝宝石”通常是指在蒙大拿其他地区找到的宝石。蒙大拿产的宝石级蓝宝石比北美洲其他任何地方都多。蒙大拿1865年在密苏里河河岸的冲击层中第一次发现蓝宝石。1889、1892和1894年在蒙大拿州西半部的其他地区也有所发现。菲利普附近的Rock Creek在蒙大拿州产量最高，而且这些宝石还激发了对附近（蓝宝石山群）的命名的灵感。1969年，蒙大拿蓝宝石和玛瑙同时被指定为蒙大拿的。 (zh)
rdfs:label
  • Saphir (Yogo) (de)
  • Zafiro Yogo (es)
  • Safiras Yogo (pt)
  • Yogo sapphire (en)
  • Yogosafirer (sv)
  • Yogo蓝宝石 (zh)
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