Is obsidian rock or gemstone

Anonymous

∙ 16y ago

Updated: 8/17/2019

Obsidian is an extrusive igneous rock. Volcanic in origin, it is very common in recent lava flows. Obsidian is primarily made of glass. Obsidian is amorphous, lacking any crystal structure found in gemstones. For more details, try asking the question - "What is obsidian"

Wiki User

∙ 16y ago

What else can I help you with?

What is the dark igneous rock formed from lava?

Obsidian, is a glass gemstone which is created in the fiery depths of a volcano, they surface during an eruption.

Is obsidian metamorphic igneous or sedimentary?

Obsidian is an igneous rock.

What does rock group does obsidian belong to?

Obsidian is in the Igneous rock group.

Is obsidian extrusive rock?

No. Obsidian is volcanic glass. Glass is amorphous and thus noncrystalline.

What is the obsidian rock type?

Obsidian is an extrusive felsic igneous rock.

Teotihuacan is famous for artifacts made from?

Volcanic rock.

Is volcanic rock obsidian?

No. Obsidian is just one of many types of volcanic rock.

What is the common name for obsidian rock?

The common name for obsidian rock is volcanic glass.

When lava cools very quickly it sometimes turn into a glassey rock called?

As lava cools once exposed to air or water, there may be no time for crystal formation, and it produces an almost glass like substance called obsidian. Obsidian is prized as a gemstone and in jewelry making.

Dark igneous rock formed from lava?

obsidian obsidian

What is dark glassy volcanic rock called?

obsidian

What group does obsidian belong to?