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["INDICES DE REFRACTION ET DENSITE"]
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[null,"1,575-1,598",null,null,"TOPAZE","1,606-1,636","3,53-3,56",null,"ALMANDIN","1,760-1,81","3,95-4,20"]
["FLUORITE",1.434,3.18,null,"JADE NEPHRITE","1,61-1,64","2,98-3,06",null,"ZIRCON","1,78-1,85","3,90-4,10"]
["OPALE","1,44-1,46","2-2,5",null,"TURQUOISE","1,61-1,65","2,60-2,85",null,"SPESSARTITE","1,79-1,81","4,12-4,18"]
["VERRE","1,46-1,70","VARIABLE",null,"PREHNITE","1,616-1,649","2,80-2,95",null,"YAG",1.833,"4,55-4,65"]
["SODALITE","1,477-1,487","2,15-2,30",null,"TOURMALINE","1,616-1,650","3,00-3,20",null,"DEMANTOÏTE",1.89,"3,82-3,85"]
["MODAVITE","1,48-1,50",2.3,null,"MONTEBRASITE","1,618-1,645",3.08,null,"TITANITE","1,900-2,034","3,52-3,54"]
["OBSIDIENNE","1,48-1,51","2,3-2,6",null,"APATITE","1,620-1,658","3,17-3,23",null,"ZIRCON Haut","1,923-2,015","4,67-4,70"]
["CALCITE","1,486-1,658",2.71,null,"SMITHSONITE","1,621-1,848","4,30-4,35",null,"Oxy.Zirc.Syn","2,13-2,20","5,60-5,90"]
["MARBRES","1,486-1,5","2,58-2,75",null,"DATOLITE","1,624-1,668","2,90-3,00",null,"NIOBATE LITH","2,21-2,30",4.64]
["CORAIL","1,49-1,65","2,6-2,7",null,"DANBURITE","1,630-1,636",3,null,"SPHALERITE","2,37-2,47",4.09]
["LAPIS",1.5,"2,70-2,90",null,"ANDALOUSITE","1,630-1,652","3,15-3,17",null,"Titanate Stron",2.409,4.09]
["NACRES",1.5,"2,70-2,80",null,"PERIDOT","1,650-1,705","3,30-3,48",null,"DIAMANT",2.418,3.52]
["PETALITE","1,502-1,520","2,4-2,6",null,"EUCLASE","1,652-1,571",3.1,null,"RUTILE SYN.","2,62-2,90",4.25]
["ORTHOSE","1,518-1,526",2.56,null,"JADE JADEITE","1,654-1,667",3.33,null,"MOISSONITE","2,65-2,70",3.22]
["AMAZONITE","1,52-1,53","2,56-2,58",null,"DIOPTASE","1,655-1,723","3,28-3,35",null,"HEMATITE",2.94,5.2]
["Pierre DE LUNE","1,52-1,54","2,56-2,70",null,"DIOPSIDE","1,660-1,715","3,20-3,40",null,"PYRITE",null,"4,90-5,10"]
["CORDIERITE","1,530-1,563","2,57-2,65",null,"JAIS",1.66,"1,20-1,35"]
["Pierre DE SOLEIL","1,535-1,547","2,62-2,67",null,"MALACHITE","1,66-1,91","3,90-4,03"]
["AGATES","1,535-1,539","2,60+",null,"SPODUMENE","1,660-1,676",3.18]
["CALCEDOINES","1,535-1,539",2.6,null,"SINHALITE","1,668-1,707",3.48]
["CHRYSOPRASE","1,535-1,539","2,60-2,65",null,"AXINITE","1,669-1,688","3,27-3,29"]
["AMBRE",1.54,"1,05-1,15",null,"KORNERUPINE","1,669-1,681","3,27-3,45"]
["AVENTURINE",1.54,2.65,null,"PHENACITE","1,670-1,654","2,95-3*"]
["IVOIRE",1.54,"1,7-1,9",null,"TANZANITE","1,692-1,706",3.35]
["JASPE",1.54,"2,40-2,91",null,"ZOÏSITE",1.7,"3,10-3,40"]
["SERPENTINES","1,54-1,57","2,58-2,62",null,"VESUVIANITE","1,70-1,721","3,35-3,45"]
["STETATITE","1,54-1,60",2.8,null,"DISTHENE-KYAN","1,710-1,731","3,56-3,68"]
["QUARTZ","1,544-1,553",2.65,null,"SPINELLE","1,711-1,719","3,60-3,90"]
["QUARTZ SYNTH.","1,544-1,553",2.65,null,"           ROUGE",1.73]
["QUARTZ INCLUS.","1,544-1,553","2,65-2,70",null,"EPIDOTE","1,715-1,797","3,25-3,50"]
["SCAPOLITE","1,545-1,600","2,63-2,71",null,"SPINELLE SYN","1,720-1,730",3.65]
["ECAILLE",1.55,1.29,null,"RHODONITE","1,720-1,747","3,4-3,7"]
["VARISCITE-AL","1,554-1,570","2,2-2,5",null,"GROSSULAIRE-JA","1,730-1,736","3,61-3,7"]
["                   FE","1,708-1,745",null,null,"             VERT CL","1,734-1,738"]
["LABRADORITE","1,560-1,568","2,69-2,72",null,"             VERT INT","1,739-1,744"]
["               JAUNE","1,565-1,573",null,null,"             ROSE",1.72]
["EMERAUDE SYNTH","1,555-1,570","2,65-2,75",null,"PYROPE","1,740-1,746","3,6-3,9"]
["          ANHYDR",1.58,null,null,"ALEXANDRITE","1,746-1,756",3.73]
["         HYDROT","1,56-1,58","2,66-2,75",null,"CHRYSOBERYL","1,746-1,756",3.73]
["EMERAUDE","1,566-1,596","2,69-2,76",null,"BENITOÏTE","1,757-1,804",3.65]
["BERYL","1,570-1,599","2,68-2,73",null,"RUBIS","1,759-1,770",4]
["AIGUE-MARINE","1,570-1,599","2,68-2,73",null,"     SYN-FUSION","1,759-1,770",4]
["HELIODORE","1,570-1,599",2.7,null,"    DIS.ANHYDRE","1,759-1,770",4]
["MORGANITE","1,570-1,599","2,71-2,90",null,"SAFIER ","1,760-1,770",4]
["RHODOCROSITE","1,60-1,82","3,45-3,70",null,"         FUSION","1,760-1,770",4]

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