Pirus

Pirus
Batu pirus berukuran 25 mm
Umum
Kategori	Phosphate minerals
Rumus (unit berulang)	CuAl₆(PO₄)₄(OH)₈·4H₂O
Klasifikasi Strunz	08.DD.15
Sistem kristal	Triklinis
Identifikasi
Warna	Toska
Perawakan	Masif, nodular
Belahan	Biasanya baik ke sempurna
Kekerasan dalam skala Mohs	5–7
Gores	Putih kebiruan
Berat jenis	2.6–2.9
Sifat optik	Biaxial (+)
Indeks bias	nα = 1.610 nβ = 1.615 nγ = 1.650
Bias ganda	+0.040
Pleokroisme	Lemah
Fusibilitas	Menyatu dalam HCl yang dipanaskan
Kelarutan	Larut dalam HCl
Referensi	^[1]^[2]^[3]

Pirus (bahasa Inggris: turquoise) merupakan mineral tidak tembus cahaya berwarna toska yang dianggap sebagai batuan berharga karena warnanya yang unik.

Etimologi

Istilah "pirus" berasal dari kata bahasa Arab فيروز (fairuz).

Referensi

^ Hurlbut, Cornelius S.; Klein, Cornelis, 1985, Manual of Mineralogy, 20th ed., John Wiley and Sons, New York ISBN 0-471-80580-7
^ "Turquoise:turquoise mineral information and data". mindat.org. Diakses tanggal 2006-10-04.
^ 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

Wikimedia Commons memiliki media mengenai Turquoise (mineral).

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] Diarsipkan 2019-06-26 di Wayback Machine.
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

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