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, unsuccessful). Hidden s
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| - Hiddenit (de)
- Hiddenite (en)
- Hiddenite (it)
- ヒデナイト (ja)
- Hiddenit (pl)
- Hiddenit (sv)
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| - L'hiddenite è una varietà verde di spodumene, il cui colore è dovuto alla presenza di cromo. Questo minerale prende il nome dal suo scopritore . (it)
- ヒデナイト（英語: Hiddenite）は、緑色のリシア輝石の一種。1879年、アメリカで発見され同国の鉱物学者ウィリアム・アール・ヒデンから由来する。パワーストーンや宝石として活用する。 (ja)
- 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 - (1853-1918). (pl)
- Hiddenit ist eine durch Chrom-Beimengungen grün bis gelblichgrün gefärbte Varietät des Minerals Spodumen. Weitere Varietäten sind der Kunzit und der hellgelbe Triphan. Der Hiddenit verdankt seinen Namen dem amerikanischen Entdecker (1853–1918), der den Edelstein 1879 im Alexander County im US-Bundesstaat North Carolina fand. (de)
- 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, unsuccessful). Hidden s (en)
- Hiddenit är en gulaktig till grön transparent variant av mineralet spodumen. Namnet hiddenit härleds till gemmologen (1853—1918), som upptäckte mineralet i North Carolina, USA 1879. Andra fyndigheter är:
* Brasilien
* Madagaskar
* Övre Myanmar 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 (!) I ett absorptionsspektrum vid spektralanalys kan följande spektrallinjer iakttas (Å): (sv)
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| - Hiddenit ist eine durch Chrom-Beimengungen grün bis gelblichgrün gefärbte Varietät des Minerals Spodumen. Weitere Varietäten sind der Kunzit und der hellgelbe Triphan. Der Hiddenit verdankt seinen Namen dem amerikanischen Entdecker (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 , seltener mit Brillantschliff 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 zwischen bläulichgrün, smaragdgrün und gelbgrün. Damit der Stein nach dem Schliff kräftige Farben zeigt, wird daher die Facettentafel üblicherweise senkrecht zur Hauptachse ausgerichtet. (de)
- 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, unsuccessful). Hidden sent samples of the odd green material to J. 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. The coloring agent is chromium. Colors can gradually fade. Hiddenite has a strong vitreous luster and displays strong colors due to pleochroism. 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. Deposits occur in granite pegmatite. (en)
- L'hiddenite è una varietà verde di spodumene, il cui colore è dovuto alla presenza di cromo. Questo minerale prende il nome dal suo scopritore . (it)
- ヒデナイト（英語: Hiddenite）は、緑色のリシア輝石の一種。1879年、アメリカで発見され同国の鉱物学者ウィリアム・アール・ヒデンから由来する。パワーストーンや宝石として活用する。 (ja)
- 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 - (1853-1918). (pl)
- Hiddenit är en gulaktig till grön transparent variant av mineralet spodumen. Namnet hiddenit härleds till gemmologen (1853—1918), som upptäckte mineralet i North Carolina, USA 1879. Andra fyndigheter är:
* Brasilien
* Madagaskar
* Övre Myanmar 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, eftersom 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):
* 4330
* 6200
* 6460
* 6860
* 6990 I Afghanistan har hiddenitkristaller påträffats ända upp till 2 m långa, dock ej av ädelstenskvalitet. (sv)
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