maakoores leiduv igasugune mineraalne, üldjuhul tahke materjal (vrd maak)
any mineral matter making up the Earth; as used by geologists, the term also includes unconsolidated material such as sand, mud, clay and peat, in addition to the harder materials described as rock in conventional usage (compare: ore)
Hea teada
A few rocks, such as quartzite (pure quarz) and marble (pure calcite) contain only one mineral.
