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Topic: Obsidian

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Obsidian use in Mesoamerica

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Igneous rock

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Rock (geology)

Chrysocolla

Microlith

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	OBSIDIAN (Volcanic Silica Glass)
		Obsidian has been used by ancient people as a cutting tool, for weapons, and for ceremonial purposes and is sometimes found by archaeologists in excavations.
		Obsidian can contain small bubbles of air that are aligned along layers created as the molten rock was flowing just before being cooled.
		The piezoelectric and optical properties in quartz are thus absent in obsidian.
	mineral.galleries.com /minerals/mineralo/obsidian/obsidian.htm (373 words)

	USGS Photo Glossary: Obsidian
		Obsidian is often formed in rhyolite lava flows where the lava cools so fast that crystals do not have time to grow.
		The colors in obsidian result from the oxidation state of the chemical elements within the tiny minerals that are finely dispersed in the glass.
		Some obsidian is banded, a consequence of oxidation on a flow surface being folded into the lava as it continues to move.
	volcanoes.usgs.gov /Products/Pglossary/obsidian.html (202 words)

	Obsidian
		Obsidian typically forms near the end of a volcanic cycle and is often associated with domes of volcanic rock, such as the hills of Glass Buttes, Oregon.
		Portions of this obsidian flow are mixed with layers of pumice, a glassy, bubble-rich, lightweight rock that develops when water vapor (steam) escapes rapidly from the molten glass at or near the ground surface.
		Obsidian is relatively unstable from a geologic perspective.
	volcano.und.nodak.edu /vwdocs/vw_hyperexchange/obsidian.html (1542 words)

	Obsidian (Site not responding. Last check: 2007-11-07)
		Obsidian is a natural glass of volcanic origin that is formed by the rapid cooling of viscous lava.
		Obsidian is extremely rich in silica, low in water, and has a chemical composition similar to rhyolite.
		Though obsidian is typically jet-fl in color, the presence of hematite (iron oxide) produces red and brown varieties, and the inclusion of tiny gas bubbles may create a golden sheen.
	geology.csupomona.edu /alert/Igneous/obsidian.htm (297 words)

	Flintknapping, Obsidian
		Obsidian consists of about 70 percent or more non-crystallized silica (silicon dioxide) and is chemically similar to granite and rhyolite.
		Obsidian is somewhat softer (5 to 5.5 on the mineral hardness scale) than most other knappable materials because of its near absence of mineral crystals.
		Portions of this obsidian flow are mixed with layers of pumice, a glassy, bubble-rich, lightweight rock that develops when water vapor (steam) escapes rapidly from the molten rock at the ground surface.
	www.eskimo.com /~knapper/HotStuff.html (1750 words)

	Obsidian Summary
		Obsidian is relatively soft with a typical hardness of 5 to 5.5.
		Obsidian is used in cardiac surgery, as well-crafted obsidian blades have a cutting edge up to five times sharper than high-quality steel surgical scalpels, with the edge of the blade reaching veritable molecular thinness.
		Obsidian is also used for ornamental purposes and as a gemstone, for it possesses the peculiar property of presenting a different appearance according to the manner in which it is cut.
	www.bookrags.com /Obsidian (950 words)

	Obsidian Hydration Dating
		Obsidian, or volcanic glass, is formed by the rapid cooling of silica-rich lava.
		Obsidian hydration dating is based on the fact that a fresh surface is created on a piece of obsidian in the tool manufacturing, or flintknapping, process.
		When a piece of obsidian is fractured, atmospheric water is attracted to the surface and begins to diffuse into the glass.
	id-archserve.ucsb.edu /Anth3/Courseware/Chronology/10_Obsidian_Hydration.html (1217 words)

	The Transformers Archive » Transformers Toys
		As a sidenote, Obsidian was repainted for both the Robots in Disguise and Universe lines, so it appears I'm not the only one who likes him.
		Obsidian's robot mode is a lot like his fellow Vehicons', except for one little thing: Obsidian is good.
		Obsidian is articulated at hips, knees, shoulders and elbows.
	tfarchive.com /toys/reviews/bm_obsidian.php (1093 words)

	Encyclopedia of Gemstones - Obsidian
		Obsidian is made of the same minerals as granite but cooled so quickly that they do not have time to crystallize.
		Though obsidian is typically jet-fl in color, the presence of hematite produces red and brown varieties, and the inclusion of tiny gas bubbles may create a golden sheen.
		Obsidian weathers slowly at a uniform rate, and the thickness of the weathered layer is measured microscopically and gauged against known standards to give a date in years.
	www.all-that-gifts.com /se/obsidian.html (346 words)

	Obsidian
		Obsidian told the JSA that he was going to merge Earth with the Shadowlands so everyone could experience the darkness he saw on a daily basis.
		Obsidian was prepared for Ian’s treachery; he thanked Ian for turning him on to his dark side, and then seemingly destroyed him.
		Obsidian was thrilled that his connection with the Shadowlands was severed.
	www.angelfire.com /ar/hellUSA/Obsidian.html (1349 words)

	GemRocks: Obsidian
		Three examples are the East Lake Obsidian of Obsidian cliff, Yellowstone National Park, Wyoming; the Mono Craters Obsidian of the Sierra Nevada of California; and the Newberry Obsidian of Oregon.
		Obsidian that exhibits flow lines has been cut into thin slices and cemented on to, for example, synthetic spinel, to made doublets with the flow lines of the slices oriented in selected directions.
		Some rainbow obsidian has been fashioned for pendants so it exhibits heart-shaped reflections; these pieces are produced by cutting a groove from near the edge to about the center on the flat side of a suitably shaped piece such as a relatively thick cabochon.
	www.cst.cmich.edu /users/dietr1rv/obsidian.htm (2168 words)

	Crystals, Gems, Gemstones: Obsidian
		Obsidian is simply a stone to be worked with consciously and with respect.
		As members of the quartz family, the first two stones help to dissolve what obsidian surfaces; chrysocolla is a warm and nurturing stone which makes the truth easier to hear.
		Obsidian, grim as it may sound to some of you, has a certain sense of humor.
	www.rainbowcrystal.com /crystal/gems/ob.html (428 words)

	Obsidian Systems (Pty) Ltd \| The Open Source Option
		Obsidian is the name that has become synonymous with providing peace of mind when it comes to Open Source Software (OSS) requirements.
		With a decade of knowledge and experience in the OSS realm Obsidian understands how open source can be utilised, modified and succesfully implemented in today's business world.
		Obsidian Systems is an alliance partner, specifically around the IBM
	www.obsidian.co.za (383 words)

	Obsidian (Site not responding. Last check: 2007-11-07)
		It is a nodule of obsidian that has persisted through the devitrification process of a larger mass of obsidian.
		This is a very thin slice of obsidian that shows dark flow bands.
		Because the obsidian is a glass (amorphous - without any internal structure), it can be honed to an extremely sharp edge.
	www.gc.maricopa.edu /earthsci/imagearchive/obsidian.htm (168 words)

	OBSIDIAN
		Obsidian is governed by the Obsidian Artistic License.
		The "obsidian" script that starts the client in an easy to use manner requires the "dialog" program to be installed, which comes with the standard RedHat distribution.
		Obsidian is a joint project between Duncan Robertson and Jon Holdsworth, with additional code by David Karla
	old.zog.net.au /computers/obsidian (950 words)

	, ergo we can't include 'quandaryheader.html' like we do elsewhere -->
		Obsidian is a first person perspective game very much in the style of Myst with a limited inventory and puzzles that rely on interpreting and interacting with objects in the game world.
		As you progress through the Obsidian structure you will slowly learn more about this strange environment and how the various sections seem to mirror the dreams that you (Lilah) and Max had when you were working on the Ceres project.
		As the specifications suggest Obsidian requires a high end machine to play it on, though I played it on a P60 with a 1 MB video card and it ran quite well with only slight hesitations in the video sequences.
	www.quandaryland.com /jsp/dispArticle.jsp?index=194 (1445 words)

	Sega of America
		Obsidian Entertainment draws upon their wealth of design knowledge creating successful games such as the best-selling Star Wars: Knights of the Old Republic II: Sith Lords and the award-winning Neverwinter Nights 2 to bring the Alien franchise to role-playing gamers for the first time.
		Obsidian Entertainment is an entertainment software development company passionately dedicated to making high quality, next generation games for PC and console systems.
		Obsidian was founded in 2003 by five game development veterans who've produced, programmed, and/or designed award-winning role playing games for a variety of platforms over the last 15 years.
	www.sega.com /corporate/corporate.php?item=pr_20061213a (577 words)

	Yellowstone National Park Obsidian Project
		The spectacular Obsidian Cliff source was one of the first obsidian sources to be described in modern scientific literature (Holmes 1879; Iddings 1887, 1888).
		Glass from the Obsidian Cliff source, however, is common in the stream terrace and alluvial deposits of Obsidian Creek that lie to the north and south of the source.
		The secondary distribution of the obsidian is probably extensive for several kilometers north and south of Obsidian Cliff but at this point we do not know the extent of the geographic limits of availability for the material.
	www.obsidianlab.com /research/research_yellowstone.html (942 words)

	PHOENIX OBSIDIAN DESIGNS - Collectible Obsidian Knives
		Each knife sports a hand-crafted obsidian blade embedded in a naturally weathered shed mule deer antler.
		Obsidian material type can be requested but are not guaranteed available, substitutions will be made.
		You may request a particular Blade Material, and every effort will be made to fulfill your request, but no guarantee is given that your knife blade will be of the selected material.
	www.obsidiandesigns.com /knives.html (448 words)

	Psionic Bestiary: Obsidian Dragon
		Obsidian dragons, while the most intelligent of the gem dragons, are also the most vicious.
		Most obsidian dragons prefer to make their lairs around volcanoes or in one of the mountains of coal found on the Elemental Plane of Fire.
		Obsidian dragons do not shy away from combat, but they make quick assessments of the opposition and determine within a couple of rounds whether they can overpower their foes easily.
	www.wizards.com /dnd/article.asp?x=dnd/psi/psi20030124b (502 words)

	The Transformers Archive » Transformers Toys
		Yes, this is another repaint in the RiD line, but I think the desert camo motif for Obsidian is really quite an improvement over the original, which, as I recall, was something like a pea green and brown.
		Apparently, Obsidian was also one of the more difficult figures to find out of the RiD line, but I don't think he was quite up in the ranks of Stormjet or Bruticus.
		Obsidian's vehicle mode is that of a futuristic-looking helicopter with dual rotors and missile launchers or cannons under the wings.
	tfarchive.com /toys/reviews/rid_obsidian.php (441 words)

	Obsidian - Utah Geological Survey
		Obsidian is a dark-colored volcanic glass formed when molten lava cools quickly.
		Snowflake obsidian, a fl obsidian with whitish-gray spots (spherulites) of radiating needle-shaped cristobalite (high-temperature quartz) crystals, is also found in the Black Rock Desert.
		Obsidian has been used for arrowheads and primitive cutting tools, and is presently used for jewelry.
	geology.utah.gov /utahgeo/rockmineral/collecting/obsidn.htm (402 words)

	Obsidian - Dutch death metal from Amsterdam - Influences from Meshuggah,Opeth,Scarve,Cynic
		Obsidian was founded in 1998 by Simon (guitar/vocals), Sjaak (guitar/vocals), Glen (bass) and Gert-Jan (drums).
		Obsidian fits perfectly into the new breed of modern math-metal/thrash bands.
		With 'Emerging' Obsidian strifes to make themself known, gain more gigs and obtain a record deal in order to spread new material among a greater audience.
	www.obsidian.nu /Dutch_Metal_Amsterdam.asp (330 words)

	Warcraft III -> Undead -> Units -> Obsidian Statue (Site not responding. Last check: 2007-11-07)
		Believed to be gifts granted by Ner'zhul, the Obsidian Statues are often used as figureheads at the forefront of many Undead armies, inspiring awe and fear in the enemy ranks.
		Once an Obsidian Statue morphs into a Destroyer it cannot return to the Obsidian Statue form.
		Multiple Obsidian Statues can be used together to recover mana for a larger number of units.
	www.battle.net /war3/undead/units/obsidianstatue.shtml (304 words)

	Obsidian Gallery - Fine Contemporary Crafts
		Obsidian Gallery has presented the best in contemporary craft to Tucson residents and visitors for twenty-two years.
		Obsidian has become a destination for collectors of innovative studio art jewelry.
		Located in an elegant shopping plaza, the gallery has a regional feel; exhibitors include many artists from the Southwest who produce work that is evocative of the area and its culture while retaining a contemporary and innovative quality.
	www.obsidian-gallery.com (138 words)

	Snowflake Obsidian Silver Jewelry Earrings, Bracelet
		Obsidian is said to get its name from the Roman Obsius, who in Pliny's reports, discovered the stone in Ethiopia.
		Obsidian is most commonly thought to be a gemstone which reflects back to us (mirrors) our own flaws.
		Obsidian is considered a gemstone of Aquarius, but Snowflake Obsidian is sometimes associated with Virgo.
	www.luckygemstones.com /obsidian-jewelry-snowflake-black.htm (662 words)

	IGN: Developer Profile: Obsidian
		They unanimously choose Obsidian, mostly due to the fact that it was the only name that didn't sound like a crappy college band.
		Taking time out from his executive duties (or perhaps just trying to look busy) Obsidian's CEO Feargus Urquhart took time to speak with us this week and give us a sense of where they've come from, where they are and where they're headed.
		Obsidian's founders have learned that you don't have to win every battle or evaluate every decision in terms of absolutes.
	pc.ign.com /articles/684/684902p1.html (1291 words)

	obsidian.html (Site not responding. Last check: 2007-11-07)
		Obsidian is very sharp because it is glass.
		Obsidian is made out the lava of a volcano.
		Under the obsidian piece (above) is leather that is made so we won't cut ourselves while making its form.
	library.thinkquest.org /J001677/obsidian.html (76 words)

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