sheen obsidian (English, noun)
expansion: sheen obsidian (countable and uncountable, plural sheen obsidians)
Senses:
topics: chemistry
geography
geology
mineralogy
natural-sciences
physical-sciences
glosses: A rare type of volcanic glass that forms when gas bubbles or mineral inclusions become trapped in layers of rapidly cooling lava.
tags: countable
uncountable
Forms:
form: sheen obsidians
tags: plural