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Born from fire, Basalt emerges from volcanic eruptions. Molten rock, rich in minerals, rapidly cools upon exposure to air or water. This swift solidification prevents large crystal growth, resulting in its fine-grained texture.
The rock's dark color stems from its high iron and magnesium content. Different cooling rates and mineral compositions can lead to variations in appearance. Columnar jointing, a striking feature, arises from contraction as the lava cools, forming hexagonal columns. This rock is a testament to the dynamic forces shaping our planet.
rough rock only £1.00 each picked at random
