This molten earth origin is what classes rainbow obsidian as an igneous rock. Lava destined to become obsidian cools rapidly once on the surface and, thanks to its viscous nature, is also below ...

Obsidian is a shiny black rock found in mountain areas, especially near lava mountains in Ark Lost Island. It is an extremely valuable resource for crafting several items. This guide will cover ...

Discover how an analysis of more than 700 objects reveals obsidian came into the Aztec capital from far and wide.

Obsidian is a shiny black rock found in mountain areas, especially near lava mountains in Ark: Ragnarok. It is an extremely valuable resource for crafting several items. This guide will cover the ...

Obsidian deposits are usually found near lava streams on this continent ... Obsidian appears in the form of shiny black rocks. For the uninitiated, they might look like regular rock deposits.

The Yellowstone Plateau Volcanic Field has some of the largest rhyolite lava flows on Earth. Have you ever wondered what ...

Obsidian is naturally occurring volcanic glass formed when lava cools rapidly. Obsidian nodules and flakes have a smooth, glassy texture and sharp edges. At a microscopic level, obsidian flakes ...

“We know lava has structural integrity because we have built columns from lava rocks to support whole houses ... field to the glass quality of obsidian or mass and opaqueness of basalt.

Hand-carved arrowheads and jagged spears made of obsidian, a sharp rock formed by volcanic magma ... "It's formed when a volcano erupts and lava cools really, really quickly," Allan said.

Minecraft’s lava is a useful resource for furnace fuel or making your own obsidian (or for roasting mobs). Keeping a steady, endless supply of lava takes a bit of work, though. In this Minecraft ...