It was liquid rock (magma) which solidified after an extrusion or eruption. Crustal rocks can re-dissolve into magma during subduction of oceanic crust.
Obsidian is a natural glass.
Other names for obsidian is Apache tears, volcanic glass, and Black obsidian.
No
Mostly from the Aztec city-states of Pachuca and Otumba. Pachuca's greenish obsidian was considered better quality, and was favored, but Otumba's greyish obsidian was also in common demand.
In some very rare instances, obsidian can be nearly colorless, but normally it is brown to black.
No. Obsidian is brittle.
One type of obsidian is snowflake obsidian, which is black with white mineral inclusions that resemble snowflakes.
Obsidian is, itself, a mineral.
yes obsidian is a crystal.
Obsidian is a natural glass.
Obsidian is an igneous rock.
Other names for obsidian is Apache tears, volcanic glass, and Black obsidian.
Obsidian is not magnetic.
how is obsidian dependent on minerals
Snowflake Obsidian
If their business is in dealing with obsidian products, and they do not own any obsidian mines, then yes they will need to buy it. If however they do not need obsidian then they do not have to buy it.
The common name for obsidian rock is volcanic glass.