0
Obsidian is a volcanic glass, so the main component is silica. It is 70-75% SiO2,
plus MgO, Fe3O4.
Mainly from molten granite, carbonated basalt and quartz for shininess.
What else can I help you with?
Teotihuacan is famous for artifacts made from?
Volcanic rock.
Is obsidian man made?
Obsidian is an igneous rock. Rocks are not man-made. Man-made substances that are similar to rock include concrete and cement.
What is a rock made from the cooling of magma?
Igneoous rock is made from cooling of magma. Obsidian is a classic example of igneous rock.
Is obsidian metamorphic igneous or sedimentary?
Obsidian is an igneous rock.
Is obsidian rock or gemstone?
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"
What does rock group does obsidian belong to?
Obsidian is in the Igneous rock group.
What is obsidian for?
Obsidian is a glasslike volcanic rock that ancient people made arrowheads and spear points from. Some of these are wonderful works of craftsmanship.
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.
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.
Dark igneous rock formed from lava?
obsidian obsidian
