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In the common Mohs hardness scale used in geology, 10 is the maximum number, the hardness of diamond.
There are several other hardness scales such as Vickers, and Brinell; but these have specialist engineering (not geologic) applications.
In brief, Brinell 28 would be rather soft - about that of copper. In Vickers, this number would represent something even softer - around that of gold.
What else can I help you with?
What is the hardness of diatomite on the mohs scale of hardness?
Diatomite has a hardness of around 5.5 on the Mohs scale of hardness.
How hard is agate?
On the hardness scale it is 6.5-7.
How hard is a finger nail on the mohs hardness scale?
It is about 2.5 in the Mohs Hardness Scale.
What is the Hardness of pyrite on mohs hardness scale?
The hardness of the mineral pyrite, or Fool's Gold, is about 6 on the Mohs hardness scale. That's a little harder than a steel knife blade, but not as hard as the mineral quartz
What specifically is a pearl's hardness?
Answer A natural of cultured pearl's hardness ranges from 3.5 to 4.5 on Mohs' scale.
What is the hardness of Quartz on the Mohs scale?
Quartz has a hardness of 7 on the Mohs scale, making it relatively hard and durable.
How hard is graphite on the hardness scale?
like a 7.
Is uranium hard?
The hardness of uranium is 6 on the Mohs scale; not so hard.
What is hornblende's hardness?
the hardness scale for the mineral hornblende is 5-6.
How hard is gold on the hardness scale?
Gold ranges from 2.5-3.0 on the Mohs scale of mineral hardness.
How hard is kaolinite?
Kaolinite is a 2 on the Mohs Hardness Scale.
How hard is an opal?
Opal has a hardness of 5.5 to 6.5 on Mohs Scale
