Obsidian can be any size.
Actually, obsidian doesn't have grains at all. Technically obsidian is a glass, which means it has no internal structure. When geologists refer the the grain size of a rock, they mean how big the crystals that make it up are. Since obsidian has no crystals, it therefore has no grain size.
There are no crystals in obsidian. Obsidian is volcanic glass, and by definition, lacks a crystal lattice (orderly arrangement of atoms). This is an inherently unstable arrangement and over time, obsidian will "devitrify", or alter into crystalline minerals (and therefore no longer be obsidian).
Because Pumice rocks has holes an obsidian doesnt
Technically, this is a trick question. Obsidian has no grain size. That is, it cooled too quickly for mineral grains to form. Rocks that form this way are referred to as "glass".
the size of the average human head
The size of an average sized head
Obsidian is composed of silica and oxygen. It has the same composition of quartz, but has cooled too quickly to form crystals of any noticeable size, and is therefore a "glass". There are also minor impurities which will give obsidian different colors.
Neither. It has no visible grain.
My 8 year old found a large piece of obsidian in dansville ny this weekend. We are amazed by its size and beauty
Rocks (sand stone, granite, ect.)go for $29.99 to $79.99 at Home Depot. Obsidian is so beautiful it has to go for at least $75 for a large rock. Say football size.
Obsidian is not magnetic.
No. Obsidian is brittle.
No. Obsidian is natural glass, mostly silica. Obsidian is of volcanic origin.
Obsidian is, itself, a mineral.
Obsidian has a hardness of about 5.
Obsidian is not a mineral.
yes obsidian is a crystal.
Obsidian has a glassy texture.
Obsidian is a natural glass.
Other names for obsidian is Apache tears, volcanic glass, and Black obsidian.
Pumice has an extremely low density due to its vesicular nature. Obsidian is not characteristically vesicular like pumice and its density is greater. Therefore, in equally sized samples pumice is lighter.
Obsidian is a fairly common and has little collector value. The only Obsidian that has a bit more value is Rainbow Obsidian. Which is still fairly common.
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.
Obsidian is a naturally occurring glass formed as an extrusive igneous rock. It is produced when acidic lava,extruded from a volcano cools very rapidly, freezing without sufficient time for crystal growth. Obsidian is commonly found within the margins of rhyolitic lava flows known as obsidian flows, where cooling of the lava is rapid. Because of the lack of crystal structure, obsidian blade edges can reach almost molecular thinness, leading to its ancient use as stone… Read More
Obsidian is not renewable.
Obsidian is of felsic chemistry.
obsidian is used for knives and spears.
how is obsidian dependent on minerals
Obsidian has a deadly poison in it. That's why people used them for hunting. After handling obsidian, wash your hands brs
Yes, natural obsidian can chip, crack, and break if hit by something. Aztecs used obsidian in arrow heads, and you can easily chip obsidian with a well placed hit with a rock. In other words: you can break obsidian easily.
There is a black rock known as obsidian that is extruded from volcanoes. Obsidian is hard and brittle and that is why it fractures with very sharp edges. Obsidian was used as arrowheads, obsidian carvings, and even obsidian blades in the stone ages.
The weight of a small quantity of obsidian is 17g
obsidian is smooth but not basalt
Obsidian is an igneous rock.
Obsidian does have a conchoidal fracture.
Obsidian can simply be describe as Volcanic Glass.
Granite and obsidian are similar in composition.
No. Obsidian is an extrusive igneous glass.
Obsidian is 3 in deep
Yes, Obsidian is an extrusive rock.
Obsidian is natural glass.
Neither, obsidian is a glass.
Obsidian Entertainment was created in 2003.
The population of Obsidian Entertainment is 2,008.