金绿宝石矿床

chrysoberyl12BeAl2O4，常含(Danieletal.,3

变石，Cr2O3→blue&redcolorsCr2O3～2%45最优质的变石是日光下色，灯光下红宝石色。但6受人们喜爱。据说，还曾有一种白蓝色，比猫眼和变加7 (Danieletal.,8Maindeposit Contactandregional(Danieletal.,9

(Danieletal., ChrysoberylChrysoberylinrare-elementpegmatites伟晶岩体侵入到花岗岩、片麻岩和云母片岩中（巴西（Cassedanne&Roditi，英细脉中（巴西）（Cassedanne&Roditi1993） 的BlackHill矿区（Černý,2002）

Contactandregional Thepegmatiteintrudingultramaficrockmodel Franzetal.,2002;Fuertesetal.,Contactandregional ThepegmatiteintrudingultramaficrockmodelContactandregional Thepegmatiteintrudingultramaficrockmodel绿宝石矿床有相似的成因（Martin-Izardetal.,1995）etal.,1995;Fuertes-Fuenteetal.,2000）。Be-B-P、水以及Si、Al和K（直闪石）和Contactandregional Thepegmatiteintrudingultramaficrockmodel（吸收了伟晶岩中的水和Si后）在侵入体的底部结⑤在接触交代带中，电气石、磷灰石、亚历山大变石和硅 Contactandregional Thepegmatiteintrudingultramaficrockmodel相似的地质和交代特征Franqueira矿区范围大概有15-20米(maybepartofalargersystem)，Tokovaja矿区更大Be的矿物都形成在酸性岩（花岗岩和伟晶岩）和超基Be、B和P的流体迁移（侵入）到更加基性的岩石中，Contactandregional Thepegmatiteintrudingultramaficrockmodel在巴西erraa地区大型的ia 金绿宝石产出在伟晶岩体依次侵入到石英岩和富中e&，）Contactandregional TheThemetamorphic/anatexismodelChrysoberylformedviametasomaticreactionsbetweensilica-poorcountryrocksandpegmatite.典型的矿区代表是在西澳大利亚的达尔文地区发现的与富Contactandregional TheThemetamorphic/anatexismodel等矿物区域性分布（Downes&Bevan,2002）Be的来源主要是片麻岩（Be~10Contactandregional TheThemetamorphic/anatexismodelTheKolsvaincentralSweden&theMaršikovinCzechBeryl+4K-feldspar+4H+→3chrysoberyl+18quartzBeryl+K-feldspar+H2O→chrysoberyl+phenakiteFranzFranz&Morteani,Contactandregional Themetamorphic/anatexismodelContactandregional TheThemetamorphic/anatexismodel6K-feldspar+beryl+6H2O+8chrysoberyl+6muscovite+66K-feldspar+beryl+8H2O+10chrysoberyl+8muscovite+166K-feldspar+beryl+6H2O+8Al2O3→3+6muscovite+6Contactandregional cercer 较大（3.7g/cm3），常常和重砂以及锡 (Danieletal., cercerLavradeHematitaTheMalacachetaTheAmericanaandSantanaTwolayers(upperandthelowercascalholayer)ofstratigraphy(7distinctivelayers)havegem-bearingchrysoberyl cerDeposis-BarroPretocerDeposis-BarroPretoinSantanaiscomposedofgempebblesinterlayeredwithinthesandandroundedrocks(limitedtransportdistances)ThelowercascalhoComprisesgraniticriverrocks,quartzgravel,sandandgemmaterial(thegemmaterialrecoveredshowsfewersignsoftransport)

Beryl+4K-feldspar+4H+Beryl+4K-feldspar+4H+→3chrysoberyl+18quartz6K-feldspar+beryl+6H2O+8Al2O3→3chrysoberyl+6muscovite+6中。由于风化作用，矿囊中许多矿物都遭到溶蚀，长变石质量也很好（重量小于3ct），使巴西成为猫眼石和变该区含宝石伟晶岩形成于