Pirus

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Pirus
Batu pirus berukuran 25 mm
Umum
KategoriPhosphate minerals
Rumus kimiaCuAl6(PO4)4(OH)8·4H2O
Klasifikasi Strunz08.DD.15
Identifikasi
WarnaToska
PerawakanMasif, nodular
Sistem kristalTriklinis
BelahanBaik ke sempurna biasanya
Kekerasan (Skala Mohs)5–7
GoresPutih kebiruan
Berat jenis2.6–2.9
Sifat optikBiaxial (+)
Indeks biasnα = 1.610 nβ = 1.615 nγ = 1.650
Bias ganda+0.040
PleokroismeLemah
FusibilitasMenyatu dalam HCl yang dipanaskan
KelarutanLarut dalam HCl
Referensi[1][2][3]

Pirus merupakan mineral tidak tembus cahaya berwarna toska yang dianggap sebagai batuan berharga karena warnanya yang unik. Istilah pirus berasal dari kata bahasa arab Fairuz (فيروز).

Referensi[sunting | sunting sumber]

  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. Diakses tanggal 2006-10-04. 
  3. ^ Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W. and Nichols, Monte C., ed. (2000). "Turquoise". Handbook of Mineralogy (PDF). IV (Arsenates, Phosphates, Vanadates). Chantilly, VA, US: Mineralogical Society of America. ISBN 0962209732. 

Bacaan lanjut[sunting | sunting sumber]

  • British Museum (2000). Aztec turquoise mosaics. Retrieved November 15, 2004 from www.thebritishmuseum.ac.uk
  • Dietrich, R. V. (2004). Turquoise. Retrieved November 20, 2004 from www.cst.cmich.edu/users/dietr1rv/turquoise.htm
  • Persian Turquoise Mine [1]
  • King, R. J. (2002) Turquoise. Geology Today 18 (3), pp. 110–114. Retrieved November 24, 2004, from: http://doi.org/10.1046/j.1365-2451.2002.00345.x
  • Pogue, J. E. (1915). The turquoise: a study of its history, mineralogy, geology, ethnology, archaeology, mythology, folklore, and technology. National Academy of Sciences, The Rio Grande Press, Glorieta, New Mexico. ISBN 0-87380-056-7
  • Schadt, H. (1996). Goldsmith's art: 5000 years of jewelry and hollowware. Arnoldsche Art Publisher, Stuttgart, New York. ISBN 3-925369-54-6
  • Schumann, W. (2000). Gemstones of the world, revised edition. Sterling Publishing. ISBN 0-8069-9461-4
  • Webster, R. (2000). Gems: Their sources, descriptions and identification (5th ed.), pp. 254–263. Butterworth-Heinemann, Great Britain. ISBN 0-7506-1674-1