List of Gemstones | Rare Minerals | Gem stones | Gems » taafeite http://www.all-gemstones.com www.all-gemstones.com    Thu, 06 May 2010 12:29:47 +0000 http://wordpress.org/?v=2.8.6 en hourly 1 Taafeite http://www.all-gemstones.com/taafeite http://www.all-gemstones.com/taafeite#comments Tue, 12 Jan 2010 03:56:20 +0000 admin http://www.all-gemstones.com/?p=1374 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
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
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
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