Taafeite
| Refractive Index : 1.723 – 1.719 (+0.002 – 0.002) |
| Optical Characteristic : DR, U- |
| Specific Gravity : 3.61 (+0.01 – 0.01) |
| Formula : BeMg3AI8O16 + Fe, Mn, Zn, V, Cr. |
| Crystal System : Hexagonal |
| Variety/Species : All |
| Species/Group : Taafeite |
| Birefringence : 0.004 to 0.005 |
| Dispersion : 0.019 |
| Hardness : 8 to 8.5 |
| Toughness : good |
| Ultrasonic : risky |
| Steam : risky |
| UV Long : Inert to weak |
| UV Short : Inert to weak |
| Pleochroism : None |
| Strength : N/A |
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| Pleochroism Colors : None |
| Heat : Avoid heating |
| Acids : No reaction |
| Light : stable |
| Polish Luster : vitreous |
| Fracture : conchoidal |
| Fracture Luster : Vitreous |
| Clarity Type : N/A |
| Tones : N/A |
| Saturations : N/A |
| Cause of Color : pink and red – chromium |
| Enhancements : none |
| Cleavage : None |
| Color Range : Pink, red, blue, violet, purple, brown, colorless, violetish blue, bluish violet, bluish purple, reddish purple |
| Transparency : Transparent |
| Phenomena : None |
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| Separations : Taafeite from- Spinel : optic character, birefringence |
| Identifying Characteristics and information No singular identifying characteristics. Use the combination of properties. May fluorescence weak green (LW and SW) |
| Spectral Data not diagnostic. Weak band at 4580. |
| Trade Names and Misnomers Magnesiotaafeite Taafeite |
Tags: taafeite
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