Amethyst is a type of quartz, making it a 7.
9 on the mohs scale
3
Iodine is not recognized as a mineral, and therefore is not assigned a number on the Mohs Scale of mineral hardness.
It is about 2.5 in the Mohs Hardness Scale.
Kaolinite is a 2 on the Mohs Hardness Scale.
Diatomite has a hardness of around 5.5 on the Mohs scale of hardness.
4
9 on the mohs scale
Quartz has a hardness of 7 on the Mohs scale, making it relatively hard and durable.
On the Mohs scale, 6.5 to 7.0.
3
The hardness of uranium is 6 on the Mohs scale; not so hard.
Iodine is not recognized as a mineral, and therefore is not assigned a number on the Mohs Scale of mineral hardness.
It is about 2.5 in the Mohs Hardness Scale.
look it up on the mohs scale
Glass is about 6-6.5
This scale is correctly called the Mohs scale. Scientists use this scale to measure a rock's hardness or softness. They can discover how hard a mineral or rocks is and drill in to it and find out more about it.