Japan has been trying to regain the islands ever since.
Image credit:Sergey Dolya
Iturup island is very beautiful with volcanic massifs and mountain ridges.
About a dozen calc-alkaline volcanoes running along the length of the elongated island form the backbone of the island.
The island also contains some high waterfalls.
It usually occurs in other mineral ores such molybdenite.
Iturup island is the only place where this mineral occurs in itspure form.
The mineral is emitted in the gaseous state from fumaroles on Kudriavy volcano and is extracted by condensation.
Kudriavy discharges up to 2060 kg rhenium per year mostly in the form of rhenium disulfide.
Named rheniite, this rare mineral fetches high prices in the market.
Rhenium is used in the combustion chambers, turbine blades, and exhaust nozzles of jet engines.
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Image credit:Mbonga/Shutterstock.com
