Gemstone ID - 532 nm

B35 - a

Species : Natrolite       
Chemical Formula : Na2Al2Si3O10‧2H2O   
Identification Characteristics : 
Classification:  Silicate
Hardness:5 ~ 5.5     S.G.:2.20 ~ 2.26
Cleavage: Perfect    
R.I.: 1.48 ~ 1.49        D.R.: 0.012
Crystal System:  Orthorhombic
Fracture: Uneven
Spectral Characteristics: 
160、206、306、440、531(cm-1)

B35 - b

Species : Natrolite       
Chemical Formula : Na2Al2Si3O10‧2H2O   
Identification Characteristics : 
Classification:  Silicate
Hardness:5 ~ 5.5     S.G.:2.20 ~ 2.26
Cleavage: Perfect    
R.I.: 1.48 ~ 1.49        D.R.: 0.012
Crystal System:  Orthorhombic
Fracture: Uneven
Spectral Characteristics: 
160、206、306、440、531(cm-1)

C17 - N(a)

Species : Nephrite jade(tremolite)      
Chemical Formula :     Ca2(Mg,Fe)5Si8O22(OH)2   
Identification Characteristics : 
Classification:  Silicate
Hardness:5 ~ 6       S.G.:2.9 ~ 3.2
Cleavage: Good        
R.I.: 1.61 ~ 1.63       D.R.: 0.027
Crystal System: Monoclinic
Fracture: Uneven to Conchoidal
Spectral Characteristics: 
367、391、412、672、930、1028、1058
(cm-1)