宝石鉴定Gemstone identification.docx
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宝石鉴定Gemstone identification.docx
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宝石鉴定Gemstoneidentification
宝石鉴定(Gemstoneidentification)
Jewelryfakesaremainlymadeinthefieldofmaterialfraud,shoddymaterialsposingasgenuinegoodstobeamongthetopjewels.Theidentificationanddetectionofforgerieswereintroducedasfollows.
Diamondidentification
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"thermalconductivityinstrument"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"fire".Butitshardnessislow(8.5),candelimitwithdiamonddelimiteachother.Andthermalconductivityismuchlowerthandiamond,canbe"thermalconductivityinstrument"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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