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'Volcanic glass' is the common name, for it is glassy, and comes from a volcano. Of use in anthropology, for such an excellent cutting tool has good trade value.
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∙ 10y ago
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What is a glassy rock?
Obsidian is a naturally occurring volcanic form of glass.
What igneous rock has no visible crystals?
Granite is a coarse grained igneous rock without Pyroxene.
Will a obsidian rock float on water?
No it will not.
Is obsidian rock organic or chemical?
Obsidian is a volcanic glass which forms when a high silica melt solidifies quickly after eruption. Organic and chemical are terms used to classify sedimentary rock. Obsidian is an igneous rock type.
What color is an obsidian rock?
obsidian rocks are red and black also sometimes orange
What is a glassy rock?
Obsidian is a naturally occurring volcanic form of glass.
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.
How does obsidian rock get its different colors?
how can a blue obsidian rock be blue
Is obsidian extrusive rock?
No. Obsidian is volcanic glass. Glass is amorphous and thus noncrystalline.
Is volcanic rock obsidian?
No. Obsidian is just one of many types of volcanic rock.
Teotihuacan is famous for artifacts made from?
Volcanic rock.
What is the obsidian rock type?
Obsidian is an extrusive felsic igneous rock.
How was the rock obsidian made?
Obsidian is a volcanic or igneous rock. It is formed when lava dries up.
What igneous rock has no visible crystals?
Granite is a coarse grained igneous rock without Pyroxene.
Dark igneous rock formed from lava?
obsidian obsidian
What group does obsidian belong to?
Obsidian is in the Igneous rock group.
