Tanzanite - Xiav thiab violet ntau yam ntawm zoisite - Muaj zog trichroism - Yees duab\nYuav cov tanzanite hauv peb lub khw\nTanzanite yog xiav thiab tseem violet ntau yam ntawm cov ntxhia zoisite. Raws li cov pab pawg neeg epidote. Lub pov haum tau pom los ntawm Manuel d'Souza hauv xyoo 1967. Hauv Merelani Hills ntawm Manyara Thaj Av, Sab qaum teb Tanzania. Nyob ze lub nroog Arusha thiab Mount Kilimanjaro. Tib qho peev txheej ntawm Tanzanite yog txuas ntxiv Tanzania. Hauv thaj chaw khawb av tsawg heev. Kwv yees li 7 km ntev thiab 2 km dav. Nyob ze ntawm Mirerani Roob.\nIb qho zoo kawg li trichroism pom tau ntawm Tanzanite. Nws zoo nkaus li hloov xiav, thiab tseem violet. Burgundy nyob ntawm kev siv nyiaj siv lead ua. Nws tuaj yeem tuaj yeem tshwm sim sib txawv thaum pom nyob rau lwm qhov teeb pom kev zoo. Cov kev nyuaj siab pom tshwm ntau thaum pom lub teeb fluorescent. Lub violet hues yog yooj yim pom thaum raug incandescent illumination. Nyob rau hauv nws lub xeev ntxhib tanzanite yog qee zaum reddish xim av. Los ntawm kev kho cua sov, nws muaj peev xwm tshem tawm cov xim brownish. Nws thaum kawg coj tawm lub xiav violet ntawm lub pob zeb.\nTanzanite keeb kwm\nManuel d'Souza, tus kws xaws khaub ncaws thiab ib nrab sij hawm kub muag hauv Arusha Tanzania. Nws pom cov pob tshab ntawm cov pob zeb xiav thiab xiav-lub pov haum muaju rau ntawm ib lub caj dab ze ntawm Mirerani. Txog 40 km sab qab teb ntawm Arusha. Nws xav tias cov ntxhia yog peridotCov. Tab sis tom qab paub tsis ntev nws tsis yog, nws xaus lus tias nws yog dumortierite. Tom qab ntawd tsis ntev, Yauhas Xa-u pom lub pob zeb. Ib tus Nairobi-raws li kev pab sab laj geologist.\nGemstone wholesaler uas yog tom qab ntawd mining aquamarine hauv cheeb tsam ze Mount Kenya. Xa-u, uas tom qab ntawd pom lub ruby ​​nto moo nyob hauv Tsavo cheeb tsam ntawm Kenya. Nws tshem tawm cov poj niam txiv neej thiab cordierite ua tau. Thiab xa cov qauv mus rau nws txiv. Hyman Saul, tus thawj tswj hwm ntawm Saks Fifth Avenue hauv New York.\nHyman Xa-u coj cov qauv mus hla kev. Rau lub koom haum Gemological America. Thaum kawg lawv tau txheeb xyuas lub nkoj tshiab ua ntau yam zoesite ntxhia.\nCov ntawv pov thawj tseeb yog tsim los ntawm cov kws kho tsiaj hauv Harvard University. Tsis tas li ntawd los ntawm Tsev khaws puav pheej British, thiab thaum kawg los ntawm Heidelberg University. Tab sis thawj tus neeg los txais cov ntawv pov thawj yog Ian McCloud. Tanzanian tsoomfwv geologist raws li Dodoma.\nLub npe hu ua “xiav zoisite”. Lub pov haum tau pauv npe ua tanzanite los ntawm Tiffany & Co. Vim tias lawv xav tau los nqis peev ntawm cov tsis tshua nyiam. Thiab ib qho chaw nyob ntawm lub pov haum.\nLos ntawm 1967, tej zaum muaj ob lab carat ntawm tanzanite tau mined hauv Tanzania. Thaum kawg, tsoomfwv Tanzanian tau tsom kwm cov mines hauv 1971.\nTags Forsterite, Rub tawm, hluavtaws, Tanzanite