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Rarest Metals Found on Earth

Metals are mostly solid materials which are found on the earth's crust. Some metals like aluminium are widely abundant while some are rare and are found in few places alone. Some metals are so so abundant that each year millions of tonnes of it is mined while some metals are only avialable in some small quantities.

 Rare Metals


Rhodium is one of the rarest and most valuable precious metals. It has a silvery-white color and its corrosion-resistant. It comes under platinum group metals and is naturally found mixed with platinum and nickel. Of the Earth's crust an estimated 0.0002 parts per million is Rhodium.


Platinum is extremely rare metal, only about 0.005 ppm in Earth's crust is Platinum. It looks a bit like silver. It is highly unreactive and dense. South Africa produces 80% of world's total Platinum production.


Indium is named after the Indigo color in its spectrum. It is mostly used in semiconductor industry. It is considered a toxic metal. It is 65th most abundant metal on earth's crust. China is the leading producer of Indium.


Iridium is another rare metal and it is also the most corrosion-resistant metal. Iridium is named after Greek goddess Iris. It is found in meteorites as well and in higher abundance than the Earth's crust.


Osmium is densest naturally occcurring element with a density of 22.59 g/cm3. It is also used to make fountain pen nib. It is bluish-gray in color. Osmium is the least abundant stable element in Earth's crust.


Palladium was named by scientist William Hyde Wollaston after the asteroid Pallas. Palladium has the lowest melting point and has the least density among the platinum group metals. As of now, Russia produces the most of this rare metal.


Rhenium is one of the rarest elements on Earth's crust with only 1 part per billion concentration.It is obtained as a by-product of the extraction and refinement of molybdenum and copper ores. Rhenium is named after European river Rhine.


Ruthenium is a rare transition metal with atomic number 44. Ruthenium was discovered in Russia by a Russian scientist and he decided to name it after the Latin name for Russia. Only about 5000 tonnes of Ruthenium is available across the Earth's crust.


Silver is a soft transition metal with highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Silver is one of the most known metals thorughout mankind and was once used as a currency. Jewelleries and utensils are still made out of silver. Despite its wide usage, its abundance in the Earth's crust is only 0.08 parts per million.

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