natural glass

Definitions

A non-crystalline, amorphous solid material formed by rapid cooling of molten rock or other geological processes, such as obsidian.

Glass-like substances produced by natural phenomena, including volcanic activity, lightning strikes (fulgurites), or meteorite impacts (tektites).

Examples

Obsidian is a type of natural glass formed when volcanic lava cools rapidly with minimal crystal growth.

Archaeologists discovered that early humans used natural glass to craft sharp tools and weapons.

Synonyms

obsidian volcanic glass tektite fulgurite impactite lechatelierite hyaloclastite

Antonyms

synthetic glass man-made glass manufactured glass artificial glass engineered glass processed glass fabricated glass