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 type of rock, so the texture would be very rough.
Obsidian has a glassy texture.
smooth, glassy
Yes it has a glassy texture
A glassy texture.
Glassy.
A glassy texture.
Obsidian falls under the group of Extrusive Volcanic Rock of very fine texture. Obsidian is generally called Volcanic Glass.
I can break like glass (fracture) and it looks like black glass and can be sharp
Pure obsidian actually has a glassy texture (grain), with no discernible crystalline structure.
Obsidian and granite are both igneous rocks. Obsidian is of extrusive origin (which means the magma cooled quickly) and has a glassy texture. Granite is of intrusive origin (which means the magma cooled slowly) and is phaneritic, or coarse grained.y
A glassy texture.
Obsidian is an igneous rock with a glassy texture. Its texture is also called hyaline, the Greek word for texture.
The texture of a rock depends on the rate that it cools. Obsidian cools so quickly that no crystals can form, therefore giving it a glassy texture.
Obsidian has a glossy texture is because of how it is formed. When it solidifies, it does not crystallize due to the lava cooling too quickly.
Obsidian is a hard, dark volcanic rock that is formed by the rapid solidification of lava. Its texture is glassy and shiny black.
Obsidian
Obsidian
Obsidian rock is simply cooled liquid magma or "lava". Obsidian rock is jet black with a very smooth texture and glossy appearance.
Granite is a coarse grained igneous rock without Pyroxene.
Obsidian is not identified, classified, or described by height. It is described by its texture, fracture, hardness, and chemical composition.
Obsidian cools so quickly the mineral grains do not have time to form.
vitreous or glassy (obsidian)