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075 Rhenium (10 grams)

Rhenium is a very dense and very rare silver coloured transition metal lying to the left of osmium in the Periodic Table. It's melting point of 3,180°C is only exceeded by tungsten. Although its existence was deduced, rhenium was the last of the stable elements to be discovered in May 1925 - less than a century ago it would have been impossible to to possess one of these rhenium pearls! Rhenium is obtained as a by-product of molybdenum smelting and no rhenium minerals were known until 1994 when Russian mineralogists studying the Kudriavy volcano in the Kuril Islands discovered a mineral consisting of nearly pure rhenium sulfide, subsequently named rheniite. Rhenium is now important in a number of nickel based superalloys used in the aerospace industry. It is generally stable but is susceptible to oxidising in moist air.

purity: 99.99%

size: ~11.75mm

vial size: 44mm x 20mm

weight: 10 grams

price: £130 ex. shipping

079 Gold

This is the gold sample from the Element Collection boxed set. It is in the form of piece of thick high-purity rolled sheet that has been shaped to visually fill the vial. We would love to supply solid gold pieces instead, which would weigh a surprisingly heavy 100g to completely fill the 7ml vial. But the cost of this single sample would then be over £2,500!