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| image = ObsidianOregon.jpg
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| caption = Obsidian yang ditemukan di Oregon's
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| luster = Kekacaan
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'''Obsidian, batu kendan'''<ref>{{Cite book|last=Stevens|first=Alan M.|last2=Tellings|first2=A. Ed Schmidgall|date=2004|url=https://books.google.co.id/books?id=hVo2ZDYbL6gC&pg=PR17&dq=indonesia+english+dictionary&hl=id&newbks=1&newbks_redir=0&source=gb_mobile_search&sa=X&ved=2ahUKEwidhqrp0p-EAxUqzjgGHYd7B5cQ6wF6BAgOEAU#v=snippet&q=Obsidian%20&f=false|title=A Comprehensive Indonesian-English Dictionary|publisher=Ohio University Press|isbn=978-0-8214-1584-9|language=en}}</ref> , atau '''batu kaca'''<ref>{{Cite book|last=Stevens|first=Alan M.|last2=Tellings|first2=A. Ed Schmidgall|date=2004|url=https://books.google.co.id/books?id=hVo2ZDYbL6gC&printsec=frontcover&hl=id#v=onepage&q=Garnet&f=false|title=A Comprehensive Indonesian-English Dictionary|publisher=Ohio University Press|isbn=978-0-8214-1584-9|language=en}}</ref> adalah kaca vulkanik alami yang berupa batuan beku ekstrusif.<ref name="rafferty2011">{{cite book |last=Rafferty |first=John P. |date=Agustus 2011 |title=Rocks |url=https://archive.org/details/rocks0000unse |publisher=The Rosen Publishing Group |page=
Kaca vulkanik ini dimanfaatkan sebagai alat pemotong pada zaman dahulu dan [[pisau bedah]] pada zaman modern.<ref>{{cite book |author1=Brian Cotterell |author2=Johan Kamminga |title=Mechanics of pre-industrial technology: an introduction to the mechanics of ancient and traditional material culture |year=1992 |publisher=Cambridge University Press |isbn=978-0-521-42871-2 |pages=127– |url=https://books.google.com/books?id=0-xOM8y6Uc8C&pg=PA127}}</ref><ref>{{cite book |author=David Wescott |date=1999 |title=Primitive Technology: A Book of Earth Skills |url=http://books.google.com.au/books?id=HlwUo0IccoMC&pg=PT90&lpg=PT90&dq=obsidian+surgical+scalpel&source=web&ots=tO8nfz3GFt&sig=7rQSy1-tT3-mm_Pp7nhyxOXjyTc&hl=en#PPT90,M1}}</ref><ref>[http://www.finescience.com/commerce/ccc1065-obsidian-scalpels.htm Supplier of modern obsidian surgical scalpels with information on use]</ref> Obsidian juga memiliki fungsi ornamental dan sebagai [[batu permata]].<ref>{{Cite book |last=Manutchehr-Danai |first=Mohsen |date=9 Maret 2013 |title=Dictionary of Gems and Gemology |publisher=Springer Science & Business Media |isbn=9783662042885 |language=en |url=https://books.google.com/?id=2UX1CAAAQBAJ&pg=PA502&dq=%C2%A0Obsidian+is+also+used+for+ornamental+purposes+and+as+a+gemstone.#v=onepage&q=%C2%A0Obsidian%20is%20also%20used%20for%20ornamental%20purposes%20and%20as%20a%20gemstone.&f=false}}</ref>
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