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Gypsum
Hardness
Mineral
Associations and Uses
1Talc (Softest)Talcum powder. (can be scratched by a fingernail.)
2GypsumPlaster of paris.
Gypsum is formed when seawater evaporates from the Earth's surface. (May be scratched by a fingernail or by a copper coin.)
3CalciteLimestone and most shells contain calcite.
(Can be scratched by a steel pocket knife or sometimes a copper coin. Will scratch a fingernail, may scratch a copper coin.)
4FluoriteFluorine in fluorite prevents tooth decay.
(Can be scratched by a steel pocket knife. Will scratch a fingernail and a copper coin.)
5ApatiteWhen you are hungry you have a big "appetite".
(Can be scratched by a steel pocket knife. Will scratch a fingernail and a copper coin.)
6OrthoclaseOrthoclase is a feldspar, and in German, "feld" means "field".
(Will not scratch glass but will scratch steel blades, copper coins & fingernails.)
7Quartz (Will scratch glass, steel blades, copper coins & fingernails.)
8TopazThe November birthstone. Emerald and aquamarine are varieties of beryl with a hardness of 8. (Will scratch glass, steel blades, copper coins & fingernails.)
9CorundumSapphire and ruby are varieties of corundum. Twice as hard as topaz.
(Will scratch glass, steel blades, copper coins & fingernails.)
10Diamond (hardest)Used in jewelry and cutting tools. Four times as hard as corundum.
(Will scratch all of the above.)
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∙ 12y ago
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Which mineral on Mohs hardness scale can be scratched by your finger?
Talc (1 on the Mohs Hardness Scale) can be scratched by a fingernail.
Which mineral can be scratched by a fingernail?
Talc is one such mineral and as such is a reference mineral in the Mohs Hardness Scale.
What mineral you can scratch with your fingernail?
The most commonly known mineral that can be scratched with a fingernail is talc.
Can halite be scratched by a fingernail?
Marginally. Halite has a hardness of 2 to 2.5, about the same as a fingernail.
Which mineral can be easily scratched by a fingernail has cleavage a metallic luster and has a black streak?
azurite is one of the minerals that has a light blue streak.
What mineral property are you testing if a fingernail scratches a mineral?
You are testing the relative hardness of the mineral.
What is used to test the hardness of a a mineral?
The Moh's scale is used to test the hardness of a mineral. It will be tested by a fingernail scratching it.
What is the fingernail test?
The fingernail test is for minerals and if a mineral is soft then you stick your fingernail in the mineral and if it is below 10 on the moh's hardness scale then it can put a dent into the mineral hope that helps!!
How is mineral hardness tested?
Mineral hardness is tested on a glass plate or usually a finger nail.
Which mineral can be easily scratched by a fingernail has a cleavage metallic luster and has a black streak?
Well you see, it's pretty simple. If a fingernail has a hardness of 2.5, and the question is asking what mineral can easily be scratched by a fingernail. Well then it is Graphite. It has a less hardness than your fingernails.
Which mineral on Mohs hardness scale can be scratched by your finger?
Talc (1 on the Mohs Hardness Scale) can be scratched by a fingernail.
Which mineral can be scratched by a fingernail?
Talc is one such mineral and as such is a reference mineral in the Mohs Hardness Scale.
What mineral you can scratch with your fingernail?
The most commonly known mineral that can be scratched with a fingernail is talc.
Can halite be scratched by a fingernail?
Marginally. Halite has a hardness of 2 to 2.5, about the same as a fingernail.
Which mineral can be easily scratched by a fingernail has cleavage a metallic luster and has a black streak?
azurite is one of the minerals that has a light blue streak.
If a mineral can be scratched by a fingernail but not by a pocket knife what does that tell us about the mineral?
It would have a Mohs hardness somewhere between 2.5 and 5.5.
Which minerals can be easily scratched by a fingernail has cleavage a metallic luster and has a black streak?
Well you see, it's pretty simple. If a fingernail has a hardness of 2.5, and the question is asking what mineral can easily be scratched by a fingernail. Well then it is Graphite. It has a less hardness than your fingernails.
