No, I do not agree. Minerals both metallic and non metallic have their own importance.
1) Metallic minerals: These minerals contain metal content and can be sub-divided into three types:
- Precious metals: Gold, Sivler, Platinum, etc
- Ferrous metals: Iron, Nickel, Chromite, Maganese
- Non-ferrous metals: Copper, Lead, Zinc, Tin etc.
2) Non metallic minerals: These minerals do not have a metal content. Sulphur, phosphates and nitrates are some of the examples. Cement is a mixture of non metallic mineral. These minerals have their own utility. We can’t manage without these minerals.