宝石鉴定Gemstone identificationWord格式.docx
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宝石鉴定Gemstone identificationWord格式.docx
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Diamondsarethehardestsubstanceinnaturalmatter.Diamondscanbeusedforanyothergemstone.Butnoothergemcanbecut.Canalsobeused"
standardhardnessmeter"
characterization,wherehardnessislessthan9degrees,arefakediamonds.Diamondsarealsolipophilic,suchasusingapentodrawalineonthesurfaceofadiamond,acontinuousstraightline,whileothersareintermittentlybroken.Theabovemethodshavecertainreferencevalueintheidentificationofdiamonds.Canalsobeobservedby10timesmagnifyingglass,in10timesmagnifyingglass,mostdiamondsvisibleXiadefects,therearetriangulargrowthlines,thediamondsurfacehas"
red,orange,blue"
andothercolorsof"
fire"
light.Radiant.Themostaccurateandreliablemethodistousethe"
thermalconductivityinstrument"
tomeasureheatconductivitydatatodistinguishbetweengenuineandfakediamonds,butthe"
isexpensive.
Sincediamondsarenobleandluxuriousornaments,itisnotuncommonfordiamondstobereplacedorcalleddiamondsonthemarketattheexpenseofpreciousstones,artificialgemstonesorevenglass:
ZIRCON:
verysimilartodiamonds,isthebestsubstitutefordiamonds.Theidentificationmethodisduetopolarizationandzirconlargebirefringence,whenusing10magnificationzirconprismsurfaceaftertheobservationprocess,fromthetopdown,canbeseenatthebottomofthedoubleridgehasobvious,andnodiamonddoubleshadowphenomenon.
Theglass:
glassrefractiveindexisverylow,nocolorlightflashingespeciallythatofdiamond;
submerged,glasslusterandimmediatelyexposed.
Sovietdrilling:
thatiscubiczirconia,originallydevelopedbytheSovietUnion,hencethename.TheSovietdiamondisanartificialcompound,butitisveryclosetonaturaldiamondsindispersion,refractiveindex,etc.,anditalsohastheattractiveappearanceof"
.Butitshardnessislow(8.5),candelimitwithdiamonddelimiteachother.Andthermalconductivityismuchlowerthandiamond,canbe"
identification,accuratelydistinguishit.
Crystal:
Althoughcrystalisanaturalmineraltransparentcrystal,afterprocessing,likediamonds,butthelackofdiamondcolorlight.
Rubyidentification
Naturalgemstone"
tenredninecrack"
withoutanyflawsandcracksofnaturalrubyisextremelyrare.Theartificialrubycolorisconsistent,internaldefectsorcrystallineinclusionsarefewandclean,andtheblockislarger.Asapreciousgem,themarketmorethan3caratnaturalrubyisveryrare,ifencounterlargeblocksofruby,toattractattention,becausenaturalrubythousandsoftimeshigherthanthevalueofartificialruby,alittlecarelessness,will"
takemedicine"
.
Thereisastrongnaturalruby"
twocolor"
theso-calledtwocolors,namelyfromdifferentdirectionoftwocolorsofredandorangered,suchasonlyonecolor,itmayberedorredgarnetspinel,glassetc..
Redspinelandnaturalrubyareverysimilar,themostconfusing,somustbeverycareful.
Identificationofsapphire
Thecolorsofnaturalsapphiresareoftenuneven,
Mosthaveflatgrowthlines.Theartificialsapphireisuniformincolor,anditsgrowthbandisanarcband.Itisoftenseenthatthereisacrumborbeadlikebubbleinthebody.
Thenaturalsapphirealsohasadistincttwocolor,whichlooksblueinonedirectionandbluishgreeninanother.Othergemstonesdifferincolorrenderingfromnaturalsapphires,dependingonwhichcolorcanbedistinguished.
Inaddition,theavailablemethodforthedeterminationofhardnessmethodofthemostsimple,naturalsapphireinTopazcarvedtraces,andotherbluegemstoTopazcarvedtraces,sowhenbuyingjewelry,suchasthereisnoinstrument,aslongasthereisapieceoftopaz,sometimesalsocansolvesomeproblems.
Innature,manysimilarandemeraldgreentransparentgemstones,commonjade,tourmaline,fluorite,olivine,garnetandzircon,whichlookliketheemeraldandiseasilyconfusedwithtourmaline,fluoriteandjade.Tothenakedeye,greenjadegenerallytranslucent,ofteninterwovenfibersandporphyritictexture,fineemeraldtransparentcrystal.Thehardnessoftheemeraldis7.5-8,whilethehardnessofthefluoriteislow,only4.Theproportionofemeraldsissmall,buttheproportionoffluorite,tourmalineandjadeiteislarger.Zirconisdispersiveandhasobviousdoubleshadow.
Inaddition,thereareartificialemeraldssimilartonaturalemeralds,greenglass,etc.thebiggestdifferencebetweenthemisthatmostofthenaturalemeraldshavedefectsorinclusions,andtwocolo
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