Answer:
During any type of mineral growth, atoms accumulate on crystal faces.
Explanation:
The minerals are formed of crystals, which can be microscopic (and even smaller, as in the case of chalcedony) or up to a few meters in length, such as the crystals found in the rock called pegmatite. The growth of the minerals is possible thanks to the accumulation of atoms in the faces of the crystal.
Minerals grow in the crystal formation phase by cooling lava or by evaporation of a solution, it is at that moment that the accumulation of the atoms happens. Once formed, it is normal not to change volume, but under certain conditions can increase and even decrease in size.
