فیروز

آزاد دائرۃ المعارف، ویکیپیڈیا سے
:چھلانگ بطرف رہنمائی، تلاش
فیروز ۔ Turquoise
Turquoise pebble, one inch (25 mm) long. This pebble is greenish and therefore low grade
General
Category Phosphate mineral
Chemical formula CuAl6(PO4)4(OH)8·4H2O
Identification
Colour Blue, blue-green, green
Crystal habit Massive, nodular
Crystal system Triclinic
Cleavage Good to perfect - usually N/A
Fracture Conchoidal
Mohs scale hardness 5-6
Lustre Waxy to subvitreous
Streak Bluish white
Specific gravity 2.6-2.9
Optical properties Biaxial (+)
Refractive index nα = 1.610 nβ = 1.615 nγ = 1.650
Birefringence +0.040
Pleochroism Weak
Fusibility Fusible in heated HCl
Solubility Soluble in HCl
References [1][2][3]
  1. ^ Hurlbut, Cornelius S.; Klein, Cornelis, 1985, Manual of Mineralogy, 20th ed., John Wiley and Sons, New York ISBN 0-471-80580-7
  2. ^ "Turquoise:turquoise mineral information and data". mindat.org. http://www.mindat.org/min-4060.html. Retrieved 2006-10-04. 
  3. ^ http://rruff.geo.arizona.edu/doclib/hom/turquoise.pdf Handbook of Mineralogy


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