The body of soft-paste is more granular than hard-paste porcelain, less glass being formed in the firing process.

Laser argon-argon dating of the glass formed by the impacts, and stratigraphic evidence, support an age of 215 25 Myr.

They made stone tools, including those from Darwin Glass a natural glass formed from a meteorite impact.

Suevite is a rock consisting partly of melted material, typically forming a breccia containing glass and crystal or lithic fragments, formed during an impact event.

Glass tiles are pieces of glass formed into consistent shapes.

Instead of emeralds, I used false gems of special glass - formed from pure powdered quartz.

White patterns on the black of the glass formed and clarified themselves into recognizable trees, buildings, water.

Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock.

At the other extreme, black glass formed by lava flows was dull as asphalt.

The glass formed is called lechatelierite which may also be formed by meteorite impact and volcanic explosions.