Dolomite
It is a carbonate category mineral It is rich in magnesium and calcium carbonate It is used as construction aggregate, cement manufacturing etc
Is a Silicate category mineral Smoky quartz is a grey, translucent variety of quartz , is a silicon dioxide Used as gemstone
Is a silicate category mineral occurs in igneous, metamorphic and sedimentary regimes mica used by the electrical industry, is used in capacitors that are ideal for high frequency and radio frequency.