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Quartz can be difficult to distinguish by looks because of its many varieties. It is usually colorless, white or gray but uncommon varieties occur in all colors. It can be transparent to translucent, and has a greasy luster. It has no cleavage and forms hexagonal prism and pyramids.
Quartz can have several different colors, including clear, pink, red, black, white and yellow. It is a form of glass and may take the shape of large crystals.
Wiki User
∙ 8y ago
Wiki User
∙ 15y agoThe igneous rock obsidian is comprised mostly of dark glass, which is volcanic glass. Sometimes obsidian can have a glittery reflectiveness due to microscopic plagioclase feldspar crystals. This can give it a golden-sheen.
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A black rock formed from cooled lava?
Obsidian
Is obsidian malleable?
No. Obsidian is brittle.
What is a type of obsidian?
Mahogany Obsidian
Which best explains the glassy look of obsidian?
The fact that obsidian IS glass. It is a naturally occurring form of volcanic glass. Different impurities give it different colors, usually black or shades of gray.
Is there such thing as obsidian?
Neither, obsidian is a glass.
What does an obsidian dragon look like as a teen?
fart pants like you
What do an obsidian rock look like?
Obsidian is a beautiful rock. It's description is pretty simple, it is a rock that formed out of cooled lava, and is black in color.
Why do obsidian rocks look dark?
because an obsidian rock has low silica
A black rock formed from cooled lava?
Obsidian
Is obsidian rapidly cooling?
Yes that is why it makes that glassy look to it.
What is a black glass like rock?
Obsidian.
What is a black volcanic rock with small crystals?
Obsidian volcanic glass formed by quenching of magma. It is typically black, smooth and has a glassy to vitreous luster.
Can obsidian be bouncy?
I doubt it. Obsidian is a very hard, glass-like black rock that can be split to give a very sharp cutting edge.
What igneous rock has a smooth glass like texture?
Obsidian
What is a glassy rock?
Obsidian is a naturally occurring volcanic form of glass.
What are 3 examples of mineraloid?
Mineraloids are a mineral like substance that don't exhibit crystallinity. 5 Examples: mercury pearl obsidian anthracite jet
What is a type of obsidian?
Mahogany Obsidian
