Latin Obsidiïus, printer's error for Obsinus pertaining to Obsius, the discoverer (according toPliny) of a similar mineral in Ethiopia; compare Middle English obsianus
Obsidianis volcanic glass. It often has flow lines that create interestingeffects. Gold sheen and silver sheen obsidian's display gold andsilver shimmerings when polished, rainbow obsidian displays differentcolors, etc. Obsidian has a reputation for being difficult to polish.Usually the reason for difficult polishing is that coarse grits cancreate a fairly deep fracture zone that doesn't come out when thestone is cut at finer grits. Another problem is obsidian doesn'tpolish well if it gets too hot. So, if you don't use super coarsegrinding wheels and if you keep your polishing wheel slow and wet,good results will easily be obtained. Diamond wheel finishing workswell.
Usually Obsidian is a jetblack stone with a vitreous (glassy) lustre. Just like glass, obsidiantends to shatter into sharp fragments when hit hard, this strength andbrittleness have resulted in its use as sharp cutting implements andweapons such as spear and arrowheads or inserted into wood madewonderful clubs. Pure obsidian is usually dark in appearance, thoughthe color varies depending on the presence of impurities. Iron andmagnesium typically give the obsidian a dark brown to black color. Veryfew samples are nearly colorless. In some stones, the inclusion ofsmall, white, radially clustered crystals of quartzlike cristobalite inthe black glass produce a blotchy or snowflake pattern (snowflakeobsidian). It may contain patterns of gas bubbles remaining from thelava flow, aligned along layers created as the molten rock was flowingbefore being cooled. These bubbles can produce interesting effects suchas a golden sheen (sheen obsidian) or an iridescent, rainbow-like sheen(rainbow obsidian).
Obsidianis volcanic glass. It often has flow lines that create interestingeffects. Gold sheen and silver sheen obsidian's display gold andsilver shimmerings when polished, rainbow obsidian displays differentcolors, etc. Obsidian has a reputation for being difficult to polish.Usually the reason for difficult polishing is that coarse grits cancreate a fairly deep fracture zone that doesn't come out when thestone is cut at finer grits. Another problem is obsidian doesn'tpolish well if it gets too hot. So, if you don't use super coarsegrinding wheels and if you keep your polishing wheel slow and wet,good results will easily be obtained. Diamond wheel finishing workswell.
Usually Obsidian is a jetblack stone with a vitreous (glassy) lustre. Just like glass, obsidiantends to shatter into sharp fragments when hit hard, this strength andbrittleness have resulted in its use as sharp cutting implements andweapons such as spear and arrowheads or inserted into wood madewonderful clubs. Pure obsidian is usually dark in appearance, thoughthe color varies depending on the presence of impurities. Iron andmagnesium typically give the obsidian a dark brown to black color. Veryfew samples are nearly colorless. In some stones, the inclusion ofsmall, white, radially clustered crystals of quartzlike cristobalite inthe black glass produce a blotchy or snowflake pattern (snowflakeobsidian). It may contain patterns of gas bubbles remaining from thelava flow, aligned along layers created as the molten rock was flowingbefore being cooled. These bubbles can produce interesting effects suchas a golden sheen (sheen obsidian) or an iridescent, rainbow-like sheen(rainbow obsidian).
Obsidian Meaning And Uses
Also found in: Thesaurus, Encyclopedia, Wikipedia.ob·sid·i·an
(ŏb-sĭd′ē-ən)n.- Obsidian (Black) Meanings, Zodiacs, Planets, Elements, Colors, Chakras, and more. Obsidian is a stone formed by lava that didn’t have enough time to cool into glass. This volcanic glass aids in protection, grounding, and spiritual communication. Known as a “psychic vacuum cleaner”, Black Obsidian gets rid of all the junk and cleanses all negativity out of your auric field and environment.
- Obsidian is a class of igneous rocks, which forms when felsic lava extruded from a volcano onto the surface of the earth. The cooling of lava takes place so rapidly that no chance remains for proper crystallization (Atomic Arrangements) and finds as an amorphous glass material.
Obsidian is formed from the sudden cooling of the molten lava, and it comes in various types. Hydrovane 2000 manual. Here we’re going to talk about Golden Obsidian, a variety of Obsidian resulting when the gas bubbles from the original lava flow are trapped in the Obsidian in the process of formation.
A usually black or banded, hard volcanic glass that displays shiny, curved surfaces when fractured and is formed by rapid cooling of lava.
[Latin obsidiānus, misreading of obsiānus (lapis), Obsian (stone), obsidian, after Obsius, a Roman who supposedly discovered it or a similar mineral.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
obsidian
(ɒbˈsɪdɪən) nObsidian Meaning
(Geological Science) a dark volcanic glass formed by very rapid solidification of lava. Also called: Iceland agate
[C17: from Latin obsidiānus, erroneous transcription of obsiānus (lapis) (stone of) Obsius, the name (in Pliny) of the discoverer of a stone resembling obsidian]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ob•sid•i•an
(əbˈsɪd i ən)n.
a volcanic glass similar in composition to granite, usu. dark but transparent in thin pieces, and having a good conchoidal fracture.
[1790–1800; < Latin Obsidiānus, printer's error for Obsiānus pertaining to Obsius, the discoverer (according to Pliny) of a similar mineral in Ethiopia; compare Middle English obsianus < Latin; see -an1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ob·sid·i·an
(ŏb-sĭd′ē-ən) A shiny, usually black, volcanic glass. Obsidian forms from lava that cools so quickly that minerals do not have a chance to form within it.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
obsidian
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
| Noun | 1. | obsidian - acid or granitic glass formed by the rapid cooling of lava without crystallization; usually dark, but transparent in thin pieces volcanic glass - a kind of natural glass produced when molten lava cools very rapidly |
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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obsidian
[ɒbˈsɪdɪən]
N → obsidianafCollins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
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