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- Hiddenite is a pale-to-emerald green variety of spodumene that is sometimes used as a gemstone. The first specimens of the hiddenite variety of spodumene were recovered about 1879 near the tiny settlement of White Plains, west of Stony Point, Alexander County, North Carolina. According to contemporary accounts, a young man named Lackey brought them to the attention of J.A.D. Stephenson, a local merchant who was also an ardent collector of minerals. Initially, the yellowish to greenish-yellow hiddenites were thought to be gemmy diopside. Stephenson brought the discovery to the attention of exploration geologist William Earl Hidden, who had been commissioned by Thomas Edison to search for any sources of platinum in North Carolina (an effort that was, in and of itself, stunningly unsuccessful). Hidden sent samples of the odd green material to John Lawrence Smith, a prominent chemist and mineralogist of Louisville, Kentucky. Smith correctly identified the specimens as being a variety of spodumene, and named them “hiddenite” in honor of Hidden. The community in which the gemstones were first found would later be renamed "Hiddenite". During the hey-day of hiddenite mining in the 1880s and 1890s it was also known as “lithia emerald”. Hidden recognized the value of the emeralds and the potential of the new gemmy green spodumene. He acquired a tract of poor quality land, which was either the site of the initial discovery or near to it, for $1500. The Emerald and Hiddenite Mining Company was organized and excavations on the site quickly recovered loose hiddenites and emeralds in the red, gravelly clay. At a depth of about 26 feet they struck bedrock and soon were recovering hiddenites from solid rock. Oddly, period newspaper accounts and statements by George Frederick Kunz (1892) indicate that mining on the site was never undertaken as a full time operation, but was only prosecuted a few weeks or months during the summer. Writing in 1892, Kunz described the hiddenite being recovered as “always transparent, ranges from colorless (rare) to a light yellow, into a yellowish green, then into a deep yellow emerald green. Sometimes an entire crystal has a uniform green color, but generally one end is yellow and the other green. ” Kunz noted that the finest crystal recovered prior to 1892 measured 68 mm tall, and could have cut a gem of 5.5ct estimated weight. The size of most cut gems were small, with a 2ct hiddenite in the Augustus C. Hamlin collection being considered among the finest of the large stones. In addition to the North Carolina locality, Hiddenite has also been found in Brazil, China, and Madagascar. Green spodumene found in Afghanistan and Pakistan has excited modest amounts of controversy in the mineral and gemological communities with debate over whether or not it should be truly considered "hiddenite" as well as claims that the green coloration is induced by irradiation and is fugitive.
- Hiddenit ist eine durch Chrom-Beimengungen grün bis gelblichgrün gefärbte Varietät des Minerals Spodumen. Eine weitere Varietät ist der rosafarbene Kunzit. Der Hiddenit verdankt seinen Namen dem amerikanischen Entdecker William Earl Hidden (1853-1918), der den Edelstein 1879 im Alexander County im US-Bundesstaat North Carolina fand. Hiddenit findet ausschließlich Verwendung als Schmuckstein. Ebenso wie Kunzit wird er überwiegend mit Treppenschliff, seltener mit Brilliantschliff versehen. Dabei ist auf die Ausrichtung der Kristallachsen zu achten, da Spodumene stark pleochroitisch sind, das heißt, die Farben wechseln in den verschiedenen Richtungen des kristallinen Gefüges.
- Hiddenit – minerał z gromady krzemianów. Należy do grupy spodumenu - bardzo ceniona, jubilerska odmiana spodumenu. Po raz pierwszy został znaleziony w 1879 r. w Karolinie Północnej w USA. Nazwa pochodzi od nazwiska odkrywcy tego minerału- Williama Earla Hiddena.
- Hiddenit är en gulaktig till grön transparent variant av mineralet spodumen. Namnet hiddenit härleds till gemmologen William Earl Hidden (1853—1918), som upptäckte mineralet i North Carolina, USA 1879. Andra fyndigheter är: Brasilien Madagaskar Övre Burma Enstaka fynd har gjorts även i Sverige och Norge. Färgen beror på spår av krom, som ger gröna nyanser, eller järn, som ger gulgröna till gula nyanser. P g a liknande utseende kan hiddenit förväxlas med bl a: Beryll Diopsid Smaragd Turmalin Färgat glas (!) Hiddenit började dyka upp i handeln som halvädelsten i slutet på 1800-talet med benämningen litium-smaragd, ibland förvanskat till lition-smaragd. Den blev aldrig riktigt populär, enär färgen inte är stabil. Den optiska dubbelbrytningen i kristallen gör att färgen skiftar i nyans alltefter den riktning som man betraktar kristallen. I ett absorptionsspektrum vid spektralanalys kan följande spektrallinjer iakttas (Å): I Afghanistan har hiddenitkristaller påträffats ända upp till 2 m långa, dock ej av ädelstenskvalitet.
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- Hiddenite is a pale-to-emerald green variety of spodumene that is sometimes used as a gemstone. The first specimens of the hiddenite variety of spodumene were recovered about 1879 near the tiny settlement of White Plains, west of Stony Point, Alexander County, North Carolina. According to contemporary accounts, a young man named Lackey brought them to the attention of J.A.D. Stephenson, a local merchant who was also an ardent collector of minerals.
- Hiddenit ist eine durch Chrom-Beimengungen grün bis gelblichgrün gefärbte Varietät des Minerals Spodumen. Eine weitere Varietät ist der rosafarbene Kunzit. Der Hiddenit verdankt seinen Namen dem amerikanischen Entdecker William Earl Hidden (1853-1918), der den Edelstein 1879 im Alexander County im US-Bundesstaat North Carolina fand. Hiddenit findet ausschließlich Verwendung als Schmuckstein. Ebenso wie Kunzit wird er überwiegend mit Treppenschliff, seltener mit Brilliantschliff versehen.
- Hiddenit – minerał z gromady krzemianów. Należy do grupy spodumenu - bardzo ceniona, jubilerska odmiana spodumenu. Po raz pierwszy został znaleziony w 1879 r. w Karolinie Północnej w USA. Nazwa pochodzi od nazwiska odkrywcy tego minerału- Williama Earla Hiddena.
- Hiddenit är en gulaktig till grön transparent variant av mineralet spodumen. Namnet hiddenit härleds till gemmologen William Earl Hidden (1853—1918), som upptäckte mineralet i North Carolina, USA 1879. Andra fyndigheter är: Brasilien Madagaskar Övre Burma Enstaka fynd har gjorts även i Sverige och Norge. Färgen beror på spår av krom, som ger gröna nyanser, eller järn, som ger gulgröna till gula nyanser.
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