Q. Who am l? 
  1.  I have metallic lustre and I am used as an ore for Sulphur .
  2.  I am colourless to white and I'm used as a food additive usually with pepper . 
  3. I'm  black to silver and I am attracted to a magnet. 
  4. I'm commonly light green and granular and often made into jewellery. 
  5. I have the lowest hardness, greasy feel, and am used as baby powder. 
  6. I'm dark and I am used in construction materials

Dear Student,

Please find below the solution of your asked queries:
  • Pyrite- It is chemically known as Iron disulphide (Chemical formula- FeS2)
  • Salt- It is chemically known as Sodium chloride (Chemical formula- NaCl)
  • Magnetite- It is chemically known as Iron (II,III) oxide (Chemical formula- Fe3O4)
  • Olivine- It is chemically known as Magnesium iron silicate.
  • Talc/Talcum- It is chemically known as Hydrated magnesium silicate.
  • Black Mica- It is found in Igneous rocks.
Hope this information clears your doubts about the topic.

Keep asking!!

Regards

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