obsidian
Example Sentences
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On Earth, volcanic glass such as obsidian is an example of silica-rich material.
From Science Daily ● Oct. 7, 2026
From precolonial Mexico we discover obsidian mirrors used for divination in Mayan and Aztec ceremonies.
From The Wall Street Journal ● Jan. 16, 2026
The shards, or clasts, have a glassy luster, making them look a lot like obsidian, a glass formed from lava when it cools very quickly.
From Salon ● Mar. 4, 2025
One gem is thought to be a rare, 2nd Century head of the Greek hero Hercules made from obsidian, a type of volcanic glass.
From BBC ● May 27, 2024
Black obsidian walls reflected the dim silver glow leaking out of a closed clamshell-like container atop a pedestal.
From "Tristan Strong Punches a Hole in the Sky" by Kwame Mbalia
Vocabulary lists containing obsidian
The Lightning Thief
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Earth Science - Middle School
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