| Hardness Mineral | 4 Fluorite | 5 Apatite | 6 Orthoclase feldspar | 7 Quartz |
|---|
What two objects can scratch fluorite?
Since Fluorite is a 4 on the scale it means that fluorite can scratch all the minerals below it but not be scratched by them. Also if a penny can scratch a mineral it rates a 3, a fingernail is 2.5,
knife blade
5.5, glass 5.5 and steel file 6.5.
Can fluorite be scratched by copper?
A mineral or other material with a higher hardness number can scratch anything with an equal or lower number. Thus, a
copper penny can scratch calcite, gypsum and talc
, while a fingernail can scratch only gypsum and talc. A piece of quartz can scratch fluorite but it cannot scratch topaz.
Can fluorite be scratched by a knife?
Fluorite can be scratched by a
knife blade
or window glass.
Which mineral can scratch all other minerals?
Diamond
, the hardest known natural substance, can produce a scratch on virtually all other substances, but can easily be shattered by the blow of a hammer.) Keep in mind that the Mohs scale does not indicate exact hardness, which depends upon the purity of the mineral sample and its degree of crystallinity.
What is the strongest rock in the world?
The strongest rock in the world is
diabase
, followed closely by other fine-grained igneous rocks and quartzite. Diabase is strongest in compression, tension, and shear stress. If mineral hardness is the determining factor of strength then diamond is technically the strongest rock in the world.
What is the hardest mineral prove?
| 10 Diamond | 9 Corundum | 8 Topaz | 7 Quartz (porcelain – 7) | 6 Orthoclase (steel file – 6.5) |
|---|
Can a copper penny scratch glass?
| HARDNESS REPRESENTATIVE MINERAL | 5.5 Glass plate, knife blade | 3 Copper penny | 2.5 Fingernail |
|---|
What mineral is not scratched by a fingernail but is scratched by a copper penny?
| mineral Mohs hardness observations on the minerals | talc 1 very easily scratched by the fingernail; has a greasy feel | gypsum 2 can be scratched by the fingernail | calcite 3 very easily scratched with a knife and just scratched with a copper coin | fluorite 4 very easily scratched with a knife but not as easily as calcite |
|---|
What would happen if you rubbed a piece of fluorite against a piece of feldspar?
What would happen if you rubbed a piece of fluorite against a piece of feldspar?
The fluorite would be scratched but the feldspar would not be scratched
.
What is the hardest stone?
Diamonds
are the hardest stone, while talc (for example) is a very soft mineral. The scale by which the hardness of minerals is measured is the Mohs Hardness Scale, which compares the resistance of a mineral to being scratched by ten standard reference minerals that vary in hardness.
What is the hardest rock type?
Metamorphic rocks
tend to be the hardest of the three types of rock, which are igneous, metamorphic, and sedimentary rocks.
What is the softest mineral on Earth?
Talc
is the softest and diamond is the hardest. Each mineral can scratch only those below it on the scale. Look at the scale below – click on the pictures to find out about each mineral. You can easily test for hardness.
What's the strongest mineral in the world?
Diamond
is a high-symmetry allotrope of carbon (C). It has a Mohs “scratch” hardness of 10, which makes it the hardest mineral known to date.
What is the weakest mineral?
Talc
is the softest mineral on Earth. The Mohs scale of hardness uses talc as its starting-point, with a value of 1.
What are 3 uses for minerals?
Energy minerals are used to
produce electricity, fuel for transportation, heating for homes and offices and in the manufacture of plastics
. Energy minerals include coal, oil, natural gas and uranium. Metals have a wide variety of uses.
