Gemstone ID - 532 nm

A41

Species : Rhodochrosite       
Chemical Formula :     MnCO3  
Identification Characteristics : 
Classification: Carbonate
Hardness:3.5 ~ 4       S.G.:3.7
Cleavage: Perfect Rhombic
R.I.: 1.60 ~ 1.80          D.R.: 0.220
Crystal System: Trigonal
Fracture: Uneven
Spectral Characteristics: 
184、287、718、1086 (cm-1)

A42

Species : Rhodolite Garnet       
Chemical Formula :  (Fe, Mg)3Al2(SiO4)3  
Identification Characteristics :   
Classification:  Silicate
Hardness:6.5 ~ 7     S.G.:3.8
Cleavage: None       
R.I.: 1.72 ~ 1.94       D.R.: None
Crystal System: Isometric
Fracture: Uneven to Conchoidal
Comment:            
Rhodolite is pyrope-almandite garnet..

A43

Species : Rhodonite    
Chemical Formula :     (Mn2+,Fe2+,Mg,Ca)SiO3
Identification Characteristics :  
Classification:  Silicate
Hardness:5.5 ~ 6.5   S.G.:3.57 ~ 3.76
Cleavage: Perfect     
R.I.: 1.71 ~ 1.73         D.R.: 0.014
Crystal System: Triclinic
Fracture: Conchoidal to Uneven
Spectral Characteristics: 
326、416、667、973、998、1293 (cm-1)

C21 - a

Species : Rutile      
Chemical Formula :     TiO2   
Identification Characteristics : 
Classification: Oxide
Hardness:6 ~ 6.5      S.G.:4.23
Cleavage: Perfect
R.I.: 2.62 ~ 2.90        D.R.: 0.287
Crystal System: Tetragonal
Fracture: Conchoidal to Uneven
Spectral Characteristics: 
289、441、610(cm-1)

C21 - b

Species : Rutile      
Chemical Formula :     TiO2   
Identification Characteristics : 
Classification: Oxide
Hardness:6 ~ 6.5      S.G.:4.23
Cleavage: Perfect
R.I.: 2.62 ~ 2.90        D.R.: 0.287
Crystal System: Tetragonal
Fracture: Conchoidal to Uneven
Spectral Characteristics: 
289、441、610(cm-1)