Gypsum
Diamond is the only mineral that has the same hardness as corundum, which is the second hardest natural mineral on the Mohs scale after diamond. Both corundum and diamond have a hardness of 9 on the Mohs scale.
The mineral that you can't scratch with your fingernail but can be scratched by a copper penny is calcite. Calcite has a hardness of about 3 on the Mohs scale, while fingernails have a hardness of around 2.5. A copper penny, which has a hardness of approximately 3.5, can easily scratch calcite.
An egg has a hardness of around 1-1.5 on the Mohs scale of mineral hardness, which means it is relatively soft and can be easily scratched by materials higher on the scale like fingernails or copper coins.
The mineral that has a similar hardness to a fingernail is gypsum. Gypsum has a Mohs hardness of 2, which makes it soft enough to be scratched by a fingernail.
The small amounts of different elements in a mineral can change its color, hardness, and other physical properties.
You start by scratching it and seek it's hardness. When you find its hardness, compare it to another mineral with the same hardness. If they look exactly the same, and have the same arrangements of minerals, then they are the exact same mineral.
You start by scratching it and seek it's hardness. When you find its hardness, compare it to another mineral with the same hardness. If they look exactly the same, and have the same arrangements of minerals, then they are the exact same mineral.
On the Mohs hardness scale, Stibnite is about 2 while fingernails are about 2.2-2.5. This means that stibnite is softer than a fingernail, but only slightly.
Diamond is the only mineral that has the same hardness as corundum, which is the second hardest natural mineral on the Mohs scale after diamond. Both corundum and diamond have a hardness of 9 on the Mohs scale.
Gypsum has a hardness of 2 on the Mohs scale, which is similar to the hardness of a fingernail.
The mineral that has a similar hardness to a fingernail is gypsum. Gypsum has a Mohs hardness of 2, which makes it soft enough to be scratched by a fingernail.
An egg has a hardness of around 1-1.5 on the Mohs scale of mineral hardness, which means it is relatively soft and can be easily scratched by materials higher on the scale like fingernails or copper coins.
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.
The mineral with hardness 3 will get scratched.
Minerologists identify mineral harness with a variety of tools. In order of hardness, they gnerally use their fingernails, nails, copper pennies, knife blades, glass, porcelain and other minerals such as quartz, topaz, corundum and diamond. The Moh's Hardness Scale gives a list of minerals in order of hardness with talc being the softest with a rating of "1" and diamond the hardest at a "10".
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The small amounts of different elements in a mineral can change its color, hardness, and other physical properties.