streak is a property of a mineral not of a rock...
obisidian is a glassyrock formed when magma is get in contact with water.
Obsidian typically exhibits a streak that is white to very light brown in color.
Probably white because of the high silicon dioxide content.
Granite is a coarse grained igneous rock without Pyroxene.
To find the streak of a rock, you can rub the rock against an unglazed white porcelain tile to observe the color of the powder left behind. The color of the streak can help identify the minerals present in the rock.
rock streak is the powered form of a mineral.
its streak is white.
Obsidian, although not a true mineral, should exhibit a white streak.
Obsidian is usually jet black. However it can also be green, brown, red, blue, yellow or orange due to light inclusions or trace elements. It is an igneous rock that results from lava cooling, streaks can be of any colour depending on the point of origin
Obsidian is an igneous rock.
Obsidian is in the Igneous rock group.
No. Obsidian is volcanic glass. Glass is amorphous and thus noncrystalline.
Volcanic rock.
No. Obsidian is just one of many types of volcanic rock.
Obsidian is an extrusive felsic igneous rock.
Obsidian typically exhibits a streak that is white to very light brown in color.
The common name for obsidian rock is volcanic glass.
obsidian obsidian