Answer: During any type of mineral growth, atoms accumulate on crystal faces. A mineral crystal grows during mineral formation as atoms are added to its surfaces, edges and corners, the types of atoms that are added depends on the crystals growing surrounding.
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.
What era are you talking of? If so, then was it Beringia? Could you please specify?
They allowed for much stronger and more durable weapons.
