Obsidian and coal are both rocks and they are formed by lava
Obsidian has a higher luster(shinier) than coal, coal is organic, and coal is sedimentary and obsidian is igneous
flint has an extremely bright shine
Coal and limestone are both forms of sedimentary rock and are often found together in deposits.
Yes, Obsidian is an extrusive rock.
Obsidian is an extrusive felsic igneous rock.
Obsidian is in the Igneous rock group.
Obsidian is an igneous rock. So the answer is YES.
how can a blue obsidian rock be blue
the obsidian rock is hundreds and hundreds of years old
No. Obsidian is just one of many types of volcanic rock.
technically obsidian is not a rock, its not even a mineral, it is glass.
Obsidian is classified as an an extrusive igneous rock; also as volcanic glass.
Obsidian rock is found in the cooled lava that cools almost instantly.
Obsidian is a volcanic or igneous rock. It is formed when lava dries up.
Obsidian is an extrusive igneous rock, usually a shiny black volcanic glass.
Obsidian is an extrusive igneous rock, formed from rapidly cooling lava.
Obsidian is an igneous rock due to the nature in which it was formed. Obsidian is formed when lava from volcanoes is hurled high into the air, cools quickly upon falling and becomes the glassy rock known as obsidian.
No. Obsidian is an extrusive igneous glass.
Obsidian is an igneous rock.
Obsidian is natural glass.
Obsidian rock is simply cooled liquid magma or "lava". Obsidian rock is jet black with a very smooth texture and glossy appearance.
It is an igneous rock.
No, obsidian is volcanic glass.
Obsidian is classified as igneous rock, solidified from molten material.
If a rock gains enough heat and then is cooled suddenly enough it turns into obsidian,
An obsidian rock is an extrusive igneous rock that forms when a volcano erupts and has no time to crystallize, so it has a glassy texture. Obsidian rocks are generally black in color.
Obsidian is an extrusive rock that cooled very rapidly without forming crystals. As a result, obsidian has a smooth, shiny texture of a thick piece of glass.
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.
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.
You make the obsidian rock cycle by listening to your teachers instead of sleeping in class lazy!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Obsidian goes through the rock cycle by being exposed to sediment for too long
the parent rock of obsidian is magma, because it is made from quickly-cooling magma after a volcanic eruption.
Both are glassy and both are black
Both are types of rocks.
Obsidian is a naturally occurring glass formed as an extrusive igneous rock
Volcanic glass, or pumice (vesicular obsidian).
Obsidian is fine grained. There are no visible grains
Obsidian is an extrusive felsic volcanic glass.
Neither. Both pumice and obsidian are igneous.
because an obsidian rock has low silica
Synonyms for obsidian are brunet, charcoal, coal, ebony, pitch, raven, slate, sable, clouded, dusky, and somber. Antonyms for obsidian are white and clean.
There are a couple examples. Coal is a rock, but it is organic and so does not contain minerals. Obsidian and pumice are both varieties of volcanic glass. Since they lack a crystal structure, they are not composed of minerals
Most rocks do but there are some exceptions. Coal (such as bituminous coal) is composed of organic material but is considered a sedimentary rock. Glassy rocks such as obsidian or pumice cool too quickly to contain crystals.
no, it is an extrusive igneous rock.
Obsidian is an glassy, extrusive, igneous rock that is found in areas that have experienced rhyolitic eruptions. Obsidian is formed when the rhyolitic lava comes into contact with water. This quick-cooling results in the glassy texture of obsidian.
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"
No. One seldom finds obsidian in a coal mine.
Obsidian is also known as volcanic glass. It's classified as a fine-grained extrusive igneous rock.
Obsidian is intrusive because it was cooled below the ground.
obsidian rocks are red and black also sometimes orange