Who is the hardness scale named after and where is he from?
Friedrich Mohs from Austria
100
What is an industrial use of diamonds?
As cutting tools
100
What must all silicates contain?
Silicon and oxygen
100
All of the following are minerals except???
Salt Quartz Sugar Gold
Sugar
200
What is fracture?
Minerals that break with uneven, rough, or jagged surfaces.
200
What is the hardest mineral?
Diamond
200
Name two uses of quartz.
Watches and electronics
200
What is a special property of the mineral magnetite?
It is attracted by a magnet
200
What hardness does a mineral have if it does not scratch glass but it scratches an iron nail?
Between 4.5-5.5
300
What is streak?
The color of a mineral when it is in a powdered form also known as the minerals "true" color.
300
What would happen if a piece of fluorite were rubbed against a piece of feldspar?
The fluorite won't scratch the feldspar because it is softer.
300
Why is bauxite considered to be a useful rock?
Its an ore of Aluminum
300
Why is titanium such a useful mineral?
Lightweight, durable, and non-toxic
300
What are the two different types of luster?
Metallic and non-metallic
400
Why is mineral color sometimes not helpful for identifying minerals (at least two reasons)?
Many different minerals can have the same color, and some minerals occur in a wide variety of colors.
400
What would you expect to happen if a mineral of hardness 7.5 were rubbed against a piece of quartz?
It would scratch the quartz but not the topaz.
400
Name two famous historical gems and explain why they are so famous.
Cullinan Diamond-largest uncut diamond ever discovered, part of the British monarchy's crown jewels.
Hope Diamond-has a reputation of bringing its owner bad luck and it is now on display at the Natural History Museum in Washington D.C.
400
What mineral makes the beautiful gem Amethyst?
Quartz
400
Will Corundum scratch a streak plate? Explain
No corundum is harder than a streak plate and will scratch the plate.
500
Name all the special tests we performed to help us identify the minerals further (there are 5).
Double refraction, magnetic attraction, Fluorescence, Specific Gravity, and Reaction with acids.
500
Which mineral will scratch feldspar but not topaz?
Quartz
500
What is pig iron?
The first iron that comes out of the smelting process. The name is derived from the time when the iron ran into molds in sand beds fed from a common runner. The row of molds was said to resemble a litter of suckling pigs.
500
What does the presence of cleavage planes within a mineral tell you about the chemical bonds that hold the mineral together?
Weak bonds exist within the mineral's structure
500
What is the most abundant element in the Earth's crust? What is the most abundant mineral group in the Earth's crust?