Quartz - the term quartzite is applied to to low grade metamorphic rocks formed predomiently of quartz, mostly they are altered sandstones. Alog with the quartz there may be low abundances of many different minerals e.g. mica, or feldspar.
Quarzite.
Quarzite.
Gitchie Manitou State Park Sioux Quarzite
Rocks contain minerals in them and minerals are just the minerals themselves.
90% of minerals are silicate.
common minerals are not rare minerals eg:not rare
Fruits themselves are not minerals, but they contain vitamins and minerals.
Major Minerals
because racks are rocks and minerals are minerals
Minerals, Minerals and more Minerals
silicate minerals and non silicate minerals
minerals don't break other minerals yet they can scratch other minerals based on their hardness which is measured by the Mohs scale