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Feldespato microclina – Fichas Gemas – Gemología MLLOPIS

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Feldespato microclina - Amazonita

MaterialFeldespato microclina
VariedadAmazonita
Composición químicaKAlSi3O8
Sistema cristalinoTriclínico
Hábito cristalinoPrismas columnares
ColorAzul verdoso y verde azulado
Índice refraccion1,522 - 1,530
Birrefringencia0,008
Signo Óptico(-)
Dureza (Mohs)6 - 6,5
Exfoliaciónbuena en dos direcciones
Peso esp.2,55 -2,57
YacimientosBrasil, India, Madagascar, Tanzania
ObservacionesEsta gema tiene un brillo característico provocado por multitud de exfoliaciones incipientes.
Amazonita cabujón Plaquita rectangular de amazonita
 
Amazonita
 
 



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