I am a very soft mineral and rich in magnesium and silica. I have a soapy feel and I am often green. I am used in baby powder and lipstick. What am I?
I would go with talc, which not only has the uses mentioned in the question but also is defined to have hardness 1 on the Mohs scale.
The reason talc is soft is because of its structure, which is based on magnesium silicate and is made up of layers that are only loosely bound to one another and slide easily; this property also makes talc a good lubricant and is what gives it its practical uses.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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