There seems to be a typo in your question. It's likely you're asking for the softest and hardest minerals.

Here's the answer:

* Softest: Talc is the softest mineral on the Mohs Hardness Scale, with a rating of 1.

* Hardest: Diamond is the hardest mineral on the Mohs Hardness Scale, with a rating of 10.

The Mohs Hardness Scale is a relative scale that compares the resistance of minerals to scratching. The higher the number, the harder the mineral.