No
Obsidian is a natural glass.
Other names for obsidian is Apache tears, volcanic glass, and Black obsidian.
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.
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.
clastic
It is clastic
is sandstone a clastic
No. Obsidian is brittle.
One type of obsidian is snowflake obsidian, which is black with white mineral inclusions that resemble snowflakes.
They are all Sedimentary
Halite (sodium chloride) is not a clastic mineral; it is an evaporite.
Coal is considered a non-clastic sedimentary rock because it forms from the compressed remains of plant material rather than from the deposition of rock fragments or grains.
None of the above. These terms describe sedimentary rocks. Granite is igneous.
Clastic material is composed of rock fragments. A clastic rock is composed of smaller rock fragments, such as sand or silt, that have been cemented together.
Obsidian is, itself, a mineral.
yes obsidian is a crystal.