Gemstone ID - 532 nm

B30 - a

Species : Kornerupine        
Chemical Formula : Mg3Al6(Si,Al,B)5O21(OH)  
Identification Characteristics : 
Classification:  Silicate
Hardness:7                  S.G.:3.2 ~ 3.3
Cleavage: Imperfect  
R.I.: 1.67 ~ 1.68           D.R.: 0.013     
Crystal System:  Orthorhombic
Fracture: Uneven
Spectral Characteristics: 
320、341、421、443、483、617、 714、901、964、  977 (cm-1)

B30 - b

Species : Kornerupine        
Chemical Formula : Mg3Al6(Si,Al,B)5O21(OH)  
Identification Characteristics : 
Classification:  Silicate
Hardness:7                  S.G.:3.2 ~ 3.3
Cleavage: Imperfect  
R.I.: 1.67 ~ 1.68           D.R.: 0.013     
Crystal System:  Orthorhombic
Fracture: Uneven
Spectral Characteristics: 
320、341、421、443、483、617、 714、901、964、  977 (cm-1) 

B31 - a

Species : Kyanite       
Chemical Formula :     Al2SiO5   
Identification Characteristics : 
Classification:  Silicate
Hardness:5.5 ~ 7     S.G.:3.53 ~ 3.67
Cleavage: Perfect    
R.I.: 1.71 ~ 1.73        D.R.: 0.017
Crystal System: Triclinic
Fracture: Uneven
Spectral Characteristics:
 295、323、400、434、483、 952(cm-1) 

B31 - b

Species : Kyanite       
Chemical Formula :     Al2SiO5   
Identification Characteristics : 
Classification:  Silicate
Hardness:5.5 ~ 7     S.G.:3.53 ~ 3.67
Cleavage: Perfect    
R.I.: 1.71 ~ 1.73        D.R.: 0.017
Crystal System: Triclinic
Fracture: Uneven
Spectral Characteristics:
 295、323、400、434、483、 952(cm-1)