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A black rock formed from cooled lava?
Obsidian
What kind of igneous rock is obsidian?
Obsidian is an igneous rock. However it differs from other rocks because it contains no minerals. It consists of natural glass, which is not a mineral because it has no crystal structure.Answers from McDougal Littell, Earth Science book
What is the common name for obsidian rock?
The common name for obsidian rock is volcanic glass.
What color is a obsidian rock?
Obsidian is typically black, but variations can occur, resulting in colors such as red, brown, or green. These variations are due to the presence of impurities in the volcanic glass.
Smooth glassy rock that is formed when lava cools?
Obsidian
What do an obsidian rock look like?
Obsidian is a beautiful rock. It's description is pretty simple, it is a rock that formed out of cooled lava, and is black in color.
What color is an obsidian rock?
obsidian rocks are red and black also sometimes orange
What igneous rock has no visible crystals?
Granite is a coarse grained igneous rock without Pyroxene.
Is obsidian metamorphic igneous or sedimentary?
Obsidian is an igneous rock.
How much is the rock obsidian in money?
? Wholesale $.50 A Lb. ? Retail $1.00 - $12.00 a Lb. Obsidian is glass, and the value depends on the color it is and the type it is
What is a smooth glassy black igneous rock?
The rock you are describing is likely obsidian. Obsidian is a naturally occurring volcanic glass formed during rapid cooling of lava. It is usually black in color and has a smooth, glassy texture.
What does rock group does obsidian belong to?
Obsidian is in the Igneous rock group.
A black rock formed from cooled lava?
Obsidian
Is obsidian extrusive rock?
No. Obsidian is volcanic glass. Glass is amorphous and thus noncrystalline.
What kind of igneous rock is obsidian?
Obsidian is an igneous rock. However it differs from other rocks because it contains no minerals. It consists of natural glass, which is not a mineral because it has no crystal structure.Answers from McDougal Littell, Earth Science book
A smooth glassy black igneos rock?
The igneous rock you are describing is likely obsidian. Obsidian is a naturally occurring volcanic glass formed from the rapid cooling of molten lava. Its smooth, glassy texture and black color make it a popular material for decorative items and tools.
What is the obsidian rock type?
Obsidian is an extrusive felsic igneous rock.
