Txawm tiasgarnetstuaj yeem txheeb xyuas qhov nrawm, nws tsis yooj yim los txiav txim siab seb hom garnet yog dab tsi vim tias muaj pes tsawg leeg ntawm garnet yog complex thiab muaj ntau hom. Garnet yog ib lub pov haum muaj xws li ob series thiab rau subspecies. Cov mis mos molecular yog R3M2 (SIO4) 3, R stands rau divalent ntsiab (calcium, magnesium, hlau, manganese), thiab M stands rau trivalent ntsiab (aluminium, hlau, chromium), sib txawv ua ke ntawm R thiab M daim ntawv sib txawv garnet subspecies , thiab qee qhov garnets txawm tias garnet sib xyaw ntawm cov kev sib txawv sib txawv.
Txawm hais tias ntau hom garnets muaj cov xim sib txawv, qhov ntsuas tsis pom tseeb, lub ntiajteb txawj nqus thiab hardness kuj txawv me ntsis, tab sis tag nrho cov garnets yog isocrystalline, ib qho refraction gemstones, tsis muaj dichroism thiab polarization. Khaws cov cuab yeej no hauv siab yog qhov tseem ceeb rau kev txheeb xyuas garnet.
Hom lub pov haum garnet thiab nws cov yam ntxwv xim:
◆ Almandine, maroon
◆ Spessartine, liab
◆ Spessartine, txiv kab ntxwv-daj
◆ Grossmantine, daj-ntsuab
◆ Andandrite, ntsuab
◆ Pyrope, sawv liab
◆ Garnet, emerald ntsuab
Raws li cov neeg nyiam los yog cov neeg siv khoom, tsis tas yuav txiav txim siab txog hom kab mob tshwj xeeb ntawm garnet, tsuav yog lawv paub tias lawv yog garnets tiag tiag. Tsis muaj ntau lub pov haum zoo ib yam li garnet ntawm kev ua lag luam, feem ntau ruby, liab zircon, spinel, hluavtaws yttrium aluminium garnet, gadolinium gallium garnet thiab iav imitation.
Txoj kev sib txawv yog: rhododendron thiab liab zircon ob leeg muaj dichroism, liab zircon kuj muaj ib tug muaj zog ob chav duab ntxoov ntxoo, thiab garnet tsis muaj duality, yog li nws yog ib qho yooj yim kom paub qhov txawv ntawm pomegranate; spinel yog feem ntau sib dua ntawm cov xim, thiab cov ncauj lus kom ntxaws txog kev siv cov cuab yeej. Txhua yam ntawm ntuj garnets muaj ib co flaws los yog crystalline inclusions (xws li acicular kub pob zeb, ib co gas-kua ob-theem inclusions, thiab lwm yam), thaum Y. A. G., G. G. G. thiab iav yog feem ntau huv si, los yog muaj spherical breadcrumb-zoo li npuas, muaj zog liab nyob rau hauv Chelsea, thiab lwm yam. Qhov tseeb, rau ib co tshwj xeeb garnets, nws kuj muaj nws tus kheej yam ntxwv. Piv txwv li, demantoid (ib hom ntsuab ntawm andandrite) feem ntau muaj "horsetail-shaped" fiber ntau suav nrog, uas tuaj yeem pom los ntawm cov neeg muaj kev paub dhau los pom.
Kev txheeb xyuas tus yuam sij: tsis muaj pleochroism, feem ntau nrog lub cev ntuj.
Kev ntsuam xyuas ntawm garnet: garnet yog ib lub pob zeb zoo nkauj, tab sis ntawm lawv, emerald ntsuab thiab pob tshab kuj yog ntau yam tsis tshua muaj. Qhov tseem ceeb tshaj plaws los ntsuas garnet yog cov xim ntawm lub gemstone, uas yuav tsum ci thiab ntshiab; thib ob, lub pob tshab yuav tsum siab, yog li cov txheej txheem gemstones tuaj yeem ci thiab "hluav taws"; thib peb, qhov flaws yuav tsum muaj tsawg, thiab cov style yuav tsum zoo nkauj; tus nqi tsis tshua cuam tshuam. Nws yuav tsum raug sau tseg tias tseem muaj lub hnub qub thiab miv lub qhov muag gemstones hauv garnet. Yog tias cov xim muaj tseeb, lub hnub qub lossis eyeliner yog qhov zoo, nws yog ntau yam nrog tus nqi siab.
Kev ntsuam xyuas tus yuam sij: cov xim yog ntshiab, crystal ntshiab thiab pob tshab, nrog ob peb blemishes.
