Variscite

 
Refractive Index : 1.590 – 1.560 (+ 0.003 – 0.006)
Optical Characteristic : DR, AGG
Specific Gravity : 2.50 (- 0.10 + 0.10)
Formula : AIPO4.2(H2O)
Crystal System : Orthorhombic
Variety/Species : All
Species/Group : Variscite
Birefringence : Not detectable
Dispersion : N/A
Hardness : 3.5 to 5
Toughness : Poor
Ultrasonic : Never
Steam : Never
UV Long : Inert to weak
UV Short : Inert to weak
Pleochroism : None
Strength : N/A

Pleochroism Colors : None
Heat : Sensitive
Acids : Attacked by acids and/or chemicals
Light : Stable
Polish Luster : Waxy to vitreous
Fracture : Granular to uneven
Fracture Luster : Dull
Clarity Type : N/A
Tones : N/A
Saturations : N/A
Cause of Color : Chromium and iron
Enhancements : None
Cleavage : Good in 1 direction
Color Range : Light to medium, yellowish green, bluish green. Often mottled or veined with yellow to brown matrix.
Transparency : Translucent to opaque
Phenomena : None

Separations : Variscite from-
Natural Turquoise Gemstone : color filiter, RI, appearance, spectrum, SG(possibly)Jadeite : RI, SG, spectrum, appearanceGlass : fracture luster, magnification, RI(possibly), spectrum(poss)Plastic : SG, magnification, RI(possibly), spectrum(possibly)Serpentine : RI(possibly), spectrum, color filter, appearance

Malachite : appearance, RI, SG

Identifying Characteristics and information
Yellow to brown matrix, stone appears pinkish through the color filter
Spectral Data
Strong line at 6880. Weaker line at 6500
Trade Names and Misnomers
Amatrix
Australian Jade (M)
Australian Turquoise (M)
Barrandite
Bolivarite
California Turquoise (M)
Lucinite
Nevada Turquoise (M)
Sabalite
Strengite

Amatrice
Utahlite
Trainite                                                                                                                                                    
 

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Turquoise Gemstone Properties and Information — December 24, 2009 @ 12:12 PM

[...] Variscite : color filter, RI, appearance, spectrum, SG(possibly) [...]

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