Gemstone ID - 532 nm

A14

Species : Diamond      
Chemical Formula :     C
Identification Characteristics :   
Classification: Simgle element
Hardness:10                  S.G.:3.52
Cleavage: Octahedral  
R.I.: 2.42                        D.R.: None
Crystal System: Isometric
Fracture: Conchoidal
Spectral Characteristics:  
1331 (cm-1)

A15 - a

Species : Diopside      
Chemical Formula :     CaMgSi2O6
Identification Characteristics : 
Classification:  Silicate
Hardness:5.5 ~ 6.5    S.G.:3.22 ~ 3.38
Cleavage: Good    
R.I.: 1.66 ~ 1.72         D.R.: 0.029
Crystal System:   Monoclinic
Fracture: Uneven
Spectral Characteristics: 
313、346、381、659、1011 (cm-1) 

A15 - b

Species : Diopside      
Chemical Formula :     CaMgSi2O6
Identification Characteristics : 
Classification:  Silicate
Hardness:5.5 ~ 6.5    S.G.:3.22 ~ 3.38
Cleavage: Good    
R.I.: 1.66 ~ 1.72         D.R.: 0.029
Crystal System:   Monoclinic
Fracture: Uneven
Spectral Characteristics: 
313、346、381、659、1011 (cm-1) 

B20 - a

Species : Danburite       
Chemical Formula :   CaB2(SiO4)2   
Identification Characteristics :
Classification:  Silicate
Hardness:7                 S.G.:3
Cleavage: Imperfect  
R.I.: 1.63 ~ 1.64          D.R.: 0.006     
Crystal System:  Orthorhombic
Fracture: Subconchoidal
Spectral Characteristics: 
346、608、1083、1123、1230、1270、1423、1488 (cm-1)

B20 - b

Species : Danburite       
Chemical Formula :   CaB2(SiO4)2   
Identification Characteristics :
Classification:  Silicate
Hardness:7                 S.G.:3
Cleavage: Imperfect  
R.I.: 1.63 ~ 1.64          D.R.: 0.006     
Crystal System:  Orthorhombic
Fracture: Subconchoidal
Spectral Characteristics: 
346、608、1083、1123、1230、1270、1423、1488 (cm-1)

B21

Species : Datolite      
Chemical Formula :     CaBSiO4(OH)  
Identification Characteristics :  
Classification:  Silicate
Hardness:5 ~ 5.5     S.G.:2.8 ~ 3.0
Cleavage: None   
R.I.: 1.62 ~ 1.65        D.R.: 0.044
Crystal System: Monoclinic
Fracture: Uneven to Conchoidal
Spectral Characteristics: 
292、391、488、652、668、692、916、983、1075、1170 (cm-1) 

B22

Species : Dioptase       
Chemical Formula :     CuSiO3 ‧ H2O  
Identification Characteristics : 
Classification:  Silicate
Hardness:5             S.G.:3.28 ~ 3.35
Cleavage: Perfect   
R.I.: 1.67 ~ 1.72      D.R.: 0.053      
Crystal System: Trigonal
Fracture: Conchoidal to Uneven
Spectral Characteristics: 
314、347、554、658、1011、1038 (cm-1)

B23

Species : Dumortierite        
Chemical Formula : Al7(BO3)(SiO4)3(O,OH)3   
Identification Characteristics : 
Classification:  Silicate
Hardness:7 ~ 8.5    S.G.:3.3 ~ 3.4
Cleavage: Good       
R.I.: 1.69 ~ 1.72      D.R.: 0.037
Crystal System:  Orthorhombic
Fracture: Uneven
Spectral Characteristics:  
207、496、510 (cm-1)

C09

Species : Demantoid garnet  
                (Andradite garnet)    
Chemical Formula :     Ca3Fe2(SiO4)3   
Identification Characteristics :
Classification:  Silicate
Hardness:6.5 ~ 7.5    S.G.:3.85
Cleavage: None          
R.I.: 1.85 ~ 1.89         D.R.: None
Crystal System: Isometric
Fracture: Conchoidal
Spectral Characteristics: 
309、349、368、491、514、 551、815
、842、874 (cm-1)

C10

Species : Diaspore       
Chemical Formula :     AlO(OH)   
Identification Characteristics :  
Classification: Hydroxide
Hardness:6.5 ~ 7      S.G.:3.2 ~ 3.5
Cleavage: Perfect         
R.I.: 1.69 ~ 1.74         D.R.: 0.046
Crystal System:  Orthorhombic
Fracture: Conchoidal
Spectral Characteristics: 
284、329、446、496、664、790、1193 (cm-1)

C11

Species : Dickite       
Chemical Formula :     Al2(Si2O5)(OH)4   
Identification Characteristics :    
Classification:  Silicate
Hardness:2 ~ 2.5     S.G.:2.60
Cleavage: Perfect
R.I.: 1.56 ~ 1.60       D.R.: 0.04
Crystal System: Monoclinic
Fracture: Uneven to Conchoidal
Spectral Characteristics: 
264、332、431、459、745、792、 914(cm-1)

C12

Species : Dolomite       
Chemical Formula :     CaMg(CO3)2   
Identification Characteristics :
Classification: Carbonate
Hardness:3.5 ~ 4        S.G.:2.85
Cleavage: Perfect Rhombic
R.I.: 1.50 ~ 1.68           D.R.: 0.179
Crystal System: Trigonal
Fracture: Subconchoidal
Spectral Characteristics: 
299、725、1098 (cm-1)