Sodalite
| Refractive Index : 1.483 (+0.004 – 0.004) |
| Optical Characteristic : SR, AGG |
| Specific Gravity : 2.25 (+0.15 – 0.10) |
| Formula : Na8AI6Si6O24CI2 |
| Crystal System : Cubic |
| Variety/Species : sodalite |
| Species/Group : Sodalite group |
| Birefringence : none |
| Dispersion : none |
| Hardness : 5 to 6 |
| Toughness : poor |
| Ultrasonic : Never |
| Steam : risky |
| UV Long : Inert to weak |
| UV Short : Inert |
| Pleochroism : None |
| Strength : N/A |
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| Pleochroism Colors : None |
| Heat : Fusible |
| Acids : Avoid hydrofluoric acid |
| Light : some may fade |
| Polish Luster : vitreous to greasy |
| Fracture : Uneven |
| Fracture Luster : Vitreous to greasy |
| Clarity Type : N/A |
| Tones : N/A |
| Saturations : N/A |
| Cause of Color : Blue: color centers;pink: chlorine color centers |
| Enhancements : none |
| Cleavage : poor. |
| Color Range : Dark, blue, violetish blue, violet, Sometimes, gray, greenish, yellowish white Often with white veins. |
| Transparency : Semitransparent to opaque |
| Phenomena : None |
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| Separations : Sodalite from- Lapis lazuli : RI, SG, magnification, fluorescence Lazulite : RI, SG, pleochroism Dumortierite quartz : RI, SG, magnification Dyed Jasper : RI, SG, appearance |
| Identifying Characteristics and information White venis are common. Rarely has pyrite inclusions. Sodalite is usually more violet than lapis lazuli. Orange phosphorescence. |
| Spectral Data not diagnostic. |
| Trade Names and Misnomers Canadian Lapis(M) Ditroite German Lapis (M) Hackmanite (S) Sodalite |
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