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Well it is a tool/rock made from volcanic glass. The Aztec used it a lot to build statues and shelter.
Obsidian is well suited to 'flaking" or "napping" which is the art of creating a sharp edge.
Obsidian will flake down to a molecular edge, being a type of naturally occurring glass it is high on the hardness scale.
Even today, some surgical scalpel tips are fabricated from obsidian.
Edwin Mitchell
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∙ 12y agoThe darkness is attributable to the iron and magnesium content. The glassy texture is due to the lack of crystallization upon solidifying, the solidification occurring extremely rapidly not allowing time for crystal growth.
Wiki User
∙ 14y agoObsidian is formed from extremely rapid cooling lava. Normally, igneous rock cools slowly enough for crystals to form. In the case of obsidian, the lava cools too quickly to allow time for crystal formation, resulting in a natural glass.
Wiki User
∙ 11y agoNo, in some cases they can appear greenish in thin flake.
Wiki User
∙ 13y agoIt is because of the presence of iron and magnesium.
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A smooth glassy black igneos rock?
It is obsidian. Obsidian was mostly used as an arrowhead for hunting.
What is black that can get a dog black?
a black bear
What black spider lives in Georgia that looks like a black widow but is all black?
it is a black widow. it is all black becausse only female black widows have the red mark on their back. this means that is a male black widow.
What is the color of a black dog?
Labradors are yellow, brown, black, and grey when they are over 4 years of age.
Where can you find a black lion?
Black lions do not exist. Black leopards and black jaguars, however, do exist.
A black rock formed from cooled lava?
Obsidian
What is the scientific name for obsidian?
Other names for obsidian is Apache tears, volcanic glass, and Black obsidian.
What is the origin Obsidian?
The origin is from medievil english. By the way, obsidian is a black mineral.
What does obsidian mean in rocks and minerals?
Obsidian is black glass formed by volcanoes.
What color is an obsidian rock?
obsidian rocks are red and black also sometimes orange
Was there a Pokemon obsidian black?
Not yet.
What color is obsidian?
Obsidian is volcanic glass and is found in several colours including - black, grey, dark green, red, yellow and pink. mostly black It is also very sharp; it can be used to make knives
A smooth glassy black igneos rock?
It is obsidian. Obsidian was mostly used as an arrowhead for hunting.
What is a black glass like rock?
Obsidian.
Obsidian is a what rock?
BLACK dumb nut
What rock is called black glass?
Obsidian.
What igneous rock is greenish black?
It is obsidian.
