Batu kendan

Obsidian
Obsidian
	Obsidian yang ditemukan di Oregon's
Umum
Kategori	Batuan vulkanik
Identifikasi
Warna	Hitam pekat atau hitam kehijauan
Fraktur	Konkoidal
Kekerasan dalam skala Mohs	5–6
Kilau	Kekacaan
Berat jenis	sekitar 2,4
Sifat optik	Translusen
Sifat lain	Tekstur: halus seperti kaca
Referensi

Obsidian, batu kendan^[4] , atau batu kaca^[5] adalah kaca vulkanik alami yang berupa batuan beku ekstrusif.^[6]^[7] Obsidian terbentuk dari ekstrusi lava felsik yang mendingin dengan cepat tanpa pertumbuhan kristal.

Kaca vulkanik ini dimanfaatkan sebagai alat pemotong pada zaman dahulu dan pisau bedah pada zaman modern.^[8]^[9]^[10] Obsidian juga memiliki fungsi ornamental dan sebagai batu permata.^[11]

Referensi

^ Peter Roger Stuart Moorey (1999). Ancient mesopotamian materials and industries: the archaeological evidence. Eisenbrauns. hlm. 108–. ISBN 978-1-57506-042-2.
^ Geological Survey (U.S.) (1981). Geological Survey (U.S.). The Survey. hlm. 185–.
^ "Obsidian: Mineral information, data and localities". mindat.org.
^ Stevens, Alan M.; Tellings, A. Ed Schmidgall (2004). A Comprehensive Indonesian-English Dictionary (dalam bahasa Inggris). Ohio University Press. ISBN 978-0-8214-1584-9.
^ Stevens, Alan M.; Tellings, A. Ed Schmidgall (2004). A Comprehensive Indonesian-English Dictionary (dalam bahasa Inggris). Ohio University Press. ISBN 978-0-8214-1584-9.
^ Rafferty, John P. (Agustus 2011). Rocks. The Rosen Publishing Group. hlm. 97–. ISBN 978-1-61530-492-9.
^ I-science I' 2006 Ed. Rex Bookstore, Inc. pp. 127–. ISBN 978-971-23-4399-5.
^ Brian Cotterell; Johan Kamminga (1992). Mechanics of pre-industrial technology: an introduction to the mechanics of ancient and traditional material culture. Cambridge University Press. hlm. 127–. ISBN 978-0-521-42871-2.
^ David Wescott (1999). Primitive Technology: A Book of Earth Skills.
^ Supplier of modern obsidian surgical scalpels with information on use
^ Manutchehr-Danai, Mohsen (9 Maret 2013). Dictionary of Gems and Gemology (dalam bahasa Inggris). Springer Science & Business Media. ISBN 9783662042885.

Pranala luar

(Inggris) Obsidian: Mineral galleries Diarsipkan 2007-06-10 di Wayback Machine.
(Inggris) USGS Obsidian photo glossary

[moorey1999-1] Peter Roger Stuart Moorey (1999). Ancient mesopotamian materials and industries: the archaeological evidence. Eisenbrauns. hlm. 108–. ISBN 978-1-57506-042-2.

[usgs1981-2] Geological Survey (U.S.) (1981). Geological Survey (U.S.). The Survey. hlm. 185–.

[mindat-3] "Obsidian: Mineral information, data and localities". mindat.org.

[4] Stevens, Alan M.; Tellings, A. Ed Schmidgall (2004). A Comprehensive Indonesian-English Dictionary (dalam bahasa Inggris). Ohio University Press. ISBN 978-0-8214-1584-9.

[5] Stevens, Alan M.; Tellings, A. Ed Schmidgall (2004). A Comprehensive Indonesian-English Dictionary (dalam bahasa Inggris). Ohio University Press. ISBN 978-0-8214-1584-9.

[rafferty2011-6] Rafferty, John P. (Agustus 2011). Rocks. The Rosen Publishing Group. hlm. 97–. ISBN 978-1-61530-492-9.

[isciensei-7] I-science I' 2006 Ed. Rex Bookstore, Inc. pp. 127–. ISBN 978-971-23-4399-5.

[8] Brian Cotterell; Johan Kamminga (1992). Mechanics of pre-industrial technology: an introduction to the mechanics of ancient and traditional material culture. Cambridge University Press. hlm. 127–. ISBN 978-0-521-42871-2.

[9] David Wescott (1999). Primitive Technology: A Book of Earth Skills.

[10] Supplier of modern obsidian surgical scalpels with information on use

[11] Manutchehr-Danai, Mohsen (9 Maret 2013). Dictionary of Gems and Gemology (dalam bahasa Inggris). Springer Science & Business Media. ISBN 9783662042885.

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Batu kendan

Referensi

Pranala luar

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