The amazing geological phenomenon of the “red island” captures international attention due to the unique mineral composition of its coastline and its multiple industrial applications.
Nature offers visual spectacles that challenge common perception, and one of the most impressive is currently located on the Island of Hormuz, situated in the Persian Gulf, within the territory of Iran. This geographical enclave has recently gone viral following the dissemination of images showing its shores bathed by waters of a deep and vibrant red. Far from being a polluting event or a negative omen, this phenomenon is due to the richness of the soil minerals, consolidating the region as an open-air geological laboratory.
The geological origin of the “Red of Hormuz”
The scarlet coloration that defines both the sand and the waves of this area is due to the very high concentration of iron oxide present in the terrain. Hormuz is essentially a salt dome where volcanic sediments and minerals have accumulated over millennia. When the waves break against the shore, the mineral—locally known as “Gelack”—mixes with the saltwater, creating a chromatic effect that transforms the coastal landscape into a scene of extraterrestrial appearance.
This pigment is not only a visual attraction for photographers and scientists; it holds significant economic and cultural relevance for the inhabitants of the region. The iron oxide extracted from the island is highly valued in various industries, being used as an input in the manufacture of cosmetics, the production of paints, ceramics, and as a coloring agent in the food sector.
An ecosystem of mineral contrasts
In addition to the predominant red, the Island of Hormuz is recognized for its geological diversity, hosting formations of crystalline salt and sands of golden and black hues. Unlike other points in the Persian Gulf, this destination has maintained a conservation profile that allows for observing the chemical interaction of minerals with the marine ecosystem in its pure form.
Experts point out that although the intensity of the color may vary depending on the tides and weather conditions, the persistence of iron oxide ensures that this phenomenon remains the hallmark of Iranian identity in the eponymous strait. The global interest in these images underscores the importance of protecting environments where geology dictates the landscape’s aesthetics in such a dramatic and natural way.
Where is the Island of Hormuz?
The Island of Hormuz is located in the south of Iran, in the strait that connects the Persian Gulf with the Gulf of Oman, off the coast of the Iranian province of Hormozgan, and is recognized for its unique geology, characterized by soils of various colors due to the high concentration of minerals, hence it is known as the “rainbow island,” combining red, ochre, yellow, and white tones.
