Alexandrite

alexandrite

Gemstone Info

Gemstone Nqe Lus

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Alexandrite

Yuav cov khoom siv ntuj alexandrite hauv peb lub khw


Lub alexandrite ntau yam ntawm chrysoberyl qhia txog xim hloov ntawm qhov xwm ntawm ambient teeb pom kev zoo.

Xim hloov phenomena

Alexandrite nyhuv yog qhov phenomena ntawm ib qho kev pom muaj xim hloov ntawm greenish rau reddish. Nrog kev hloov nyob rau hauv qhov chaw illumination. Nws tau los ntawm cov me me hloov hloov ntawm txhuas los ntawm chromium ions nyob rau hauv lub qauv siv lead ua. Nws ua rau lub teeb ci ntsa iab tshaj ntawm ntau yam ntawm cov kab nrib qaum nyob hauv cheeb tsam daj ntawm lub teeb pom kev zoo. Vim hais tias tib neeg lub zeem muag feem ntau nkag mus rau lub teeb ntsuab thiab tsawg kawg nkaus rau lub teeb liab. Nws zoo nkaus li greenish nyob rau hauv nruab hnub qhov twg tag nrho spectrum ntawm pom lub teeb yog tam sim no. Thiab reddish nyob rau hauv incandescent lub teeb uas emits tsawg dua ntsuab thiab xiav spectrum. Qhov kev hloov xim no yog kev ywj pheej ntawm kev hloov ntawm Hawj nrog saib qhov kev taw qhia los ntawm cov crystal uas yuav tshwm sim los ntawm pleochroism.

Lub pob zeb los ntawm Ural Toj siab nyob rau hauv Russia muaj peev xwm ntsuab los ntawm daylight thiab liab los ntawm incandescent lub teeb. Lwm hom qoob loo yuav yellowish los yog liab dawb thaum nruab hnub thiab ib tug columbine los yog txiv pos liab los ntawm lub teeb pom kev zoo.

Lub pob zeb uas pom tias muaj xim hloov xim thiab muaj xim muaj zog heev thiab nrhiav tom qab. Tab sis lub pob zeb uas qhia tsawg dua cov xim piv txwv no kuj suav hais tias yog alexandrite los ntawm lub pov haum labs xws li Gemological Institution of America.

Keeb kwm

Raws li ib zaj dab neeg tiam sis muaj teeb meem, alexandrite tau pom los ntawm Finnish mineralogist Nils Gustaf Nordenskiöld (1792-1866). Thiab lub npe Alexandrite nyob rau hauv lub Honor ntawm yav tom ntej Tsar Alexander II ntawm Russia. Nordenskiöld tus thawj cov kev tshawb pom tshwm sim los ntawm kev soj ntsuam ntawm ib qho tshiab pom ntxhia qauv. Nws tau txais los ntawm Perovskii, uas nws txheeb raws li kab zauv thaum xub thawj. Tus thawj emerald kuv qhib hauv 1831.

5 carats pob zeb thiab loj dua tau kev xav tias yuav tsum tau pom nyob rau hauv thaj tsam Ural xwb. Tab sis muaj txij li tau pom nyob rau hauv loj ntau thiab tsawg hauv Brazil. Lwm cov nyiaj tso rau hauv Is Nrias teb, kuj yog Madagascar, Tanzania thiab Sri Lanka. Gemstones nyob rau hauv ntau thiab tsawg tshaj peb carats yog heev tsawg.

Khoom cua

Niaj hnub no, ob peb lub tsev qiv ntawv tuaj yeem tsim cov khoom siv hluavtaws (lab) uas muaj cov khoom siv tib yam thiab cov khoom hauv lub cev ua cov roj ntsha alexandrite. Muaj ntau txoj hau kev tuaj yeem tsim cov kua nplaum, thiab Czocchralski (los yog rub), thiab cov pob zeb ua kom muaj zog. Flux-grown gems yog haum nyuaj rau qhov txawv ntawm lub ntuj gemstone li lawv muaj inclusions uas zoo li ntuj.
Czochralski lossis rubged alexandrite yog qhov yooj yim txheeb xyuas vim nws yog ib qho zoo heev. Thiab muaj cov nplai qhov muag pom nyob rau hauv qhov loj tuaj. Txawm hais tias cov xim hloov hauv rub lub pob zeb yuav ua tau los ntawm xiav kom liab. Cov xim hloov tsis yog tiag tiag zoo li ntawm natural alexandrite los ntawm tej nyiaj cas. Hydrothermal lab-zus pob zeb muaj qhov zoo tib yam lub cev thiab tshuaj ua kom lub pob zeb tiag tiag.

Qee cov gemstones dag hais raws li kev ua zes-xaj hluav taws xob alexandrite. Lawv yeej muaj hluavtaws xim hloov cov kabmob. Los yog tseem hloov xim hloov spinel. Lawv tsis tau ua chrysoberyl. Yog li ntawd, lawv yuav muaj ntau dua los piav txog nws yog ib qho kev simened alexandrite es tsis yog hluavtaws. Cov khoom xyaw alexandrite zoo li sapphire tau nyob ze rau xyoo 100. Nws qhia tau hais tias tus yam ntxwv muaj xim liab hloov. Nws tsis tshua zoo li alexandrite vim tias tsis muaj ib qho ntsuab.

Alexandrite los ntawm Madagascar


Yuav cov khoom siv ntuj alexandrite hauv peb lub khw

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kev ua yuam kev: Cov ntsiab lus yog kev tiv thaiv !!