collagen
hardness
It is about 2.5 in the Mohs Hardness Scale.
Keratin
Yes. A steel nail has a Mohs hardness greater than that of fluorite.
nail, penny, your fingernail, or other rocks
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5
The hardness of a steel nail is about 4.5 (About the same hardness of the mineral Fluorite.)
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5
hardness
hardness
hardness
hardness
Mineral hardness is tested on a glass plate or usually a finger nail.
It is about 2.5 in the Mohs Hardness Scale.
Keratin