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 http://www.all-gemstones.com/vivianite http://www.all-gemstones.com/vivianite#comments Thu, 13 Aug 2009 05:47:50 +0000 admin http://www.all-gemstones.com/?p=1477   Refractive Index : 1.675 – 1.569 Optical Characteristic : DR, biaxial negative Specific Gravity : 2.68-2.64 Formula : Fe3(PO4)2.8H2O Crystal System : Monoclinic Variety/Species : All Species/Group : Vivianite Birefringence : 0.049 – 0.059 Dispersion : Hardness : 1.5 to 2 Toughness : Poor Ultrasonic : Never Steam : Never UV Long : Inert UV Short : Inert Pleochroism : 2 colors Strength : Strong

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Pleochroism Colors : Intense blue to indigo/pale yellowish green or bluish green Heat : Sensitive Acids : Sensitive Light : Stable Polish Luster : Vitreous to pearly Fracture : Fibrous or sectile Fracture Luster : Vitreous Clarity Type : N/A Tones : N/A Saturations : N/A Cause of Color : Enhancements : None Cleavage : Perfect in 1 direction Color Range : Colorless, green, blue, bluish green, (dark) greenish Transparency : Transparent to opaque Phenomena : None

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Separations : Vivianite from- Identifying Characteristics and information
Bluish white streak.Vivianite darkens spontaneously. so an attractive colored stone becomes less so, over time. Spectral Data
Not diagnostic Trade Names and Misnomers
Fossile Turquoise(M)
Ivory Turquoise(M)
Odontolite
Tooth turquoise(M)
Vivianite   ]]> http://www.all-gemstones.com/vivianite/feed 0