GENERAL DESCRIPTION
Obsidian refers to a dark, shiny glass formed in nature by the rapid cooling of lava. Obsidian is widely distributed and has been used since Paleolithic (before 3500 BCE) times for mirrors, weapons, tools, and jewelry. Obsidian is often black in color but may also be red, brown or green. It produces conchoidal fractures when cleaved. Sources of obsidian include Anatolia, Armenia, Ethiopia, Greece (Milos), Italy (Lipari, Eolie), Iceland, the U.S. (Wyoming), Mexico (Teotihuacan), Guatemala (Tikal), and Peru. Obsidian changes into pumice when it is melted.
Excerpt from
Getty Vocabulary, AAT (obsidian (volcanic glass / pyroclastic rock): AAT: 300011254).
NOTES
ASSOCIATED CONTENT CHUNKS
AUDIO ASSETS
VIDEO ASSETS
IMAGE ASSETS
268417311: UMO. [Caption] Obsidian. Source: Ji-Elle (Own work), Wikimedia Commons, accessed: August 15, 2016, https://commons.wikimedia.org/wiki/File%3ALipari-Obsidienne_(5).jpg.
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WEB RESOURCES
ARCHIVAL RESOURCES
FUN FACTS
TEACHING IDEAS
RULES
SET OPERATOR AS OR
apply to OBJECTS where medium contains obsidian
apply to OBJECTS where number equals 2008.82.3
Category
rules_operator
OR
General Description
Obsidian refers to a dark, shiny glass formed in nature by the rapid cooling of lava. Obsidian is widely distributed and has been used since Paleolithic (before 3500 BCE) times for mirrors, weapons, tools, and jewelry. Obsidian is often black in color but may also be red, brown or green. It produces conchoidal fractures when cleaved. Sources of obsidian include Anatolia, Armenia, Ethiopia, Greece (Milos), Italy (Lipari, Eolie), Iceland, the U.S. (Wyoming), Mexico (Teotihuacan), Guatemala (Tikal), and Peru. Obsidian changes into pumice when it is melted.
Excerpt from
Getty Vocabulary, AAT (obsidian (volcanic glass / pyroclastic rock): AAT: 300011254).
Fun Facts
TEACHING IDEAS
Archival Resources
Web Resources
Notes
source file
materials_and_techniques-0137.xml.nores