A mineral of volcanic origin with large crystals is most likely formed through crystallization of molten material at Earth’s surface.
When magma erupts at the surface during a volcanic event, it cools relatively quickly compared to magma that cools slowly underground. However, if the cooling occurs slowly (as can happen in certain volcanic environments, like in the case of a lava dome), it can still lead to the formation of larger crystals. In general, larger crystals are formed from slower cooling processes, while rapid cooling typically produces smaller crystals or a glassy texture.
In contrast, crystallization through evaporation or from hot water solutions is typically associated with sedimentary processes rather than volcanic ones.
1 answer