Miv lub qhov muag kornerupine

miv lub qhov muag kornerupine

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Miv lub qhov muag kornerupine

Yuav cov gemstones hauv ntuj hauv peb lub khw


Miv lub qhov muag kornerupine tseem hu ua Prismatine. Nws yog ib qho tsis tshua muaj boro-silicate ntxhia nrog lub mis (Mg, Fe2 +) 4 (Al, Fe3 +) 6 (SiO4, BO4) 5 (O, OH) 2. Nws crystallizes nyob rau hauv orthorhombic - dipyramidal siv lead ua zog raws li xim av, ntsuab, thiab daj kom tsis muaj xim tsis muaj xim tourmaline xws li prisms los yog nyob rau hauv loj heev fibrous cov ntaub ntawv.
Ua ntej tshaj, Nws muaj ib qho kev nyuab siab ntawm 7. Lwm, ib qho kev nqus ntawm 3.3 rau 3.34. Tsis tas li ntawd, nws cov cim ntawm kev zais yog n = 1.660 - 1.671, nβ = 1.673 - 1.683 thiab nγ = 1.674 - 1.684.

Nws tshwm sim nyob rau hauv boron-nplua nuj volcanic thiab tseem cov pob zeb uas txo tau cov pob zeb uas tau ua nyob rau qib siab metamorphism. Peb kuj pom tau tias nws nyob rau hauv metamorphosed anorthosite complexes.
Cat lub qhov muag kornerupine feem ntau pom muaj nrog sapphirine, kuj muaj cordierite, spinel, corundum, tourmaline, grandidierite, dumortierite, kyanite, sillimanite, andalusite, biotite, phlogopite, magnetite, ilmenite, hematite, rutile.

Miv lub qhov muag kornerupine yog qhov tseem ceeb li lub pov haum thaum nws tseem txhais tau ntsuab rau daj ntxoov. Lub emerald ntsuab ntau yam tshwj xeeb tshaj yog nrhiav tom qab. Nws tsim cov txheej txheem kev daws teeb meem nrog prismatine. Lub zog pleochroic, nws pom ntsuab lossis liab ploog thaum pom los ntawm ntau cov lus qhia. Nws muaj cov lus sau cia.

Nws tau xub piav nyob rau hauv 1884 rau qhov tshwm sim nyob rau hauv Fiskernæs nyob rau sab qab zog sab hnub poob Greenland. Lub npe kornerupine yog los ntawm cov kws geologist, Andreas Nikolaus Kornerup (1857-1883). Nws tsis yog kom txog thaum 1912 tias cov khoom pov thawj zoo tau pom. Nws tseem tsis tshua muaj rau hnub no.

Miv lub qhov muag pom kev

Nyob rau hauv lub pov haum, sib tham, sib tham, los yog kev sib tham hauv tus miv, yog qhov pom ntawm qhov kev xav pom hauv cov gemstones. Coined los ntawm Fabkis "oeil de chat", lub ntsiab lus "miv lub qhov muag", sib tham tshwm sim los ntawm lub qauv fibrous ntawm ib yam khoom, raws li nyob rau hauv miv lub qhov muag tourmaline, los ntawm fibrous inclusions los yog kab noj hniav tsis pub dhau lub pob zeb, raws li nyob rau hauv miv lub qhov muag chrysoberylCov. Cov kem tsev uas ua rau sib tham yog cov koob. Cov qauv ntsuas tau ua tiav tsis muaj cov pov thawj ntawm cov hlab los yog cov fibers.Qhov koob koob precipitates txhua kab teeb perpendicularly nrog kev cuam tshuam rau cov nyhuv no. Lub lattice parameter ntawm lub koob ntais ntawv tsuas yog ib qho ntawm peb orthorhombic siv lead ua axes ntawm lub chrysoberyl, raws li ib qho kev sib haum xeeb raws li qhov kev coj no.

Cov phenomenon zoo li lub brilliance ntawm ib cov lus silk. Qhov luminous streak ntawm reflected teeb yog ib txwm perpendicular mus rau kev coj ntawm lub fibers. Rau lub gemstone los qhia cov nyhuv no zoo dua, cov duab yuav tsum yog ib tug cabochon. Hloov nrog rau lub hauv paus uas tsis paub, tsis yog lub ntsej muag, nrog cov fibers lossis fibrous cov khoom sib luag mus rau lub hauv paus ntawm lub tiav pob zeb. Qhov zoo tshaj plaws tiav nrws qhia ib zaug. Ib lub teeb ntawm lub teeb uas txav mus hla lub pob zeb thaum nws puv. Tshawb nrhiav lub pob zeb ntawm cov khoom qis me dua hauv cov khoom zoo li muaj qhov ntsej muag nrog cov xim daj ntseg. Faceted pob zeb tsis qhia cov nyhuv zoo.

Cat lub qhov muag kornerupine los ntawm khej


Yuav cov gemstones hauv ntuj hauv peb lub khw

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