Obsidian is an igneous rock. Rocks are not man-made. Man-made substances that are similar to rock include concrete and cement.
The properties of obsidian made it a valuable commodity for stone age tool makers, as a blade could be fashioned with a sharpness finer than that of any steel, down to nearly molecular thinness. Professional obsidian knappers can make surgical obsidian knives which can leave a smaller scar than steel knives. Another use of obsidian is as a stone in jewelry. Obsidian is a glasslike volcanic rock that ancient people made arrowheads and spear points from. Some of these are wonderful works of craftsmanship. It has been used to craft tools, historically. Obsidian has also been used to make jewelry.
Not entirely, though it is rather rich in silica.
No. Obsidian is brittle.
One type of obsidian is snowflake obsidian, which is black with white mineral inclusions that resemble snowflakes.
No, Obsidian and Granite are two different types of rocks with distinct properties. Obsidian is a volcanic glass formed from rapidly cooling lava, while Granite is an igneous rock made up of various minerals like quartz and feldspar. They have different mineral compositions and formation processes, so Obsidian cannot turn into Granite.
Volcanic rock.
obsidian
Obsidian stone
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"
it is made of wood and volcanic glass obsidian
Obsidian is a glasslike volcanic rock that ancient people made arrowheads and spear points from. Some of these are wonderful works of craftsmanship.
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No, diamond cannot break obsidian. Obsidian is harder than diamond on the Mohs scale, which measures the hardness of minerals. Diamond itself is the hardest natural material, but it cannot scratch or break obsidian due to its unique molecular structure.
Obsidian does not react with acid. Igneous rocks in general rarely react with acid.
The properties of obsidian made it a valuable commodity for stone age tool makers, as a blade could be fashioned with a sharpness finer than that of any steel, down to nearly molecular thinness. Professional obsidian knappers can make surgical obsidian knives which can leave a smaller scar than steel knives. Another use of obsidian is as a stone in jewelry. Obsidian is a glasslike volcanic rock that ancient people made arrowheads and spear points from. Some of these are wonderful works of craftsmanship. It has been used to craft tools, historically. Obsidian has also been used to make jewelry.
Not entirely, though it is rather rich in silica.
Obsidian is a naturally occurring volcanic glass composed primarily of silicon dioxide, which is a compound made up of the elements silicon and oxygen. Therefore, obsidian is not an element but a mixture of elements in compound form.