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Obsidian - Wikipedia Produced from felsic lava, obsidian is rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium It is commonly found within the margins of rhyolitic lava flows known as obsidian flows These flows have a high content of silica, giving them a high viscosity
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Obsidian: Meaning, Properties, and Uses - Wisdom Of The Spirit Obsidian is a naturally occurring volcanic glass formed when lava cools rapidly, preventing crystal growth The result? A smooth, shiny rock that fractures into sharp edges—so sharp, in fact, that ancient civilizations used it to make knives, arrowheads, and surgical tools
Obsidian: Igneous Rock - Pictures, Uses, Properties Obsidian is an igneous rock that forms when molten rock material cools so rapidly that atoms are unable to arrange themselves into a crystalline structure It is an amorphous material known as a " mineraloid " The result is a volcanic glass with a smooth uniform texture that breaks with a conchoidal fracture (see photo) Where Does Obsidian Form?
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Obsidian (software) - Wikipedia Obsidian is designed to help users organize and structure their thoughts and knowledge in a flexible, non-linear way [24] The software is free for personal use, with optional paid services such as cloud synchronization and online publishing
Obsidian: Properties, Formation, Uses, and Famous Locations Obsidian is a naturally occurring volcanic glass formed when felsic lava cools rapidly without crystallizing Its smooth glassy texture and sharp edges have made it highly valued by ancient cultures for tools and weapons, and today it remains popular for decorative objects and jewelry
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Obsidian | Rock, Color, Composition, Uses | Britannica Obsidian has been used across history to make weapons, implements, tools, ornaments, and mirrors Because of its conchoidal fracture (smooth curved surfaces and sharp edges), the sharpest stone artifacts were fashioned from obsidian