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Tellurium metal ingot by RWMM

Tellurium (Te)

Regular price $66.95 Sale

Tellurium metal ingot - one troy ounce - .9999 bullion
First identified as an unknown metal in gold ore (calaverite) near the present day city of Sibiu, Romania, tellurium's discovery in 1782 would eventually be credited to Franz-Joseph Muller von Reichenstein who spent three years on laboratory work to characterize this metal. Though he never identified it as a new element he did help determine it was not antimony or bismuth as had initially been suspected. This new element would later be named tellurium by Martin Heinrich Klaproth in 1798. Tellurium is extremely rare in the Earth's crust (see below link to our favorite chart detailing where our metals fall in terms of their relative rarity), about as rare as platinum. Gold telluride is the most common gold containing compound, though itself is more rare than naturally occurring, i.e. native, gold. See below link to our blog for some other interesting nuggets regarding tellurium as it relates to the gold rushes of the 19th century.
Today the largest industrial uses for tellurium are in metallurgy, specifically to improve the properties of iron, copper, and lead. Its use is growing rapidly in the production of cadmium-telluride solar panels, some of the most efficient ever produced. It is also used in solid-state x-ray detectors, computer chips, optical and blu-ray discs, infrared detectors, telecommunication fiber, as a colorant in glass and ceramics, and in the vulcanization of rubber. The U.S. Dept. of Energy predicts a shortage of tellurium by 2025.
Inscribed on our ingots are the chemical symbol (Te), purity (99.99%), weight (one troy ounce), and a serial number (this number is unique and will vary). On the reverse is our logo.  These ingots are lightly polished, but the underlying crystallization pattern (not nearly as prevalent as is seen in the last picture accompanying this listing, which is included for reference only and is NOT the ingot form we sell) is still visible and may have superficial fissuring. There can be small edge dings and other small imperfections and discolorations which do not detract from the inherent value of this metal. These will oxidize over time so we advise to store them in a cool, dry place to slow down the oxidation process. Starting with this batch, we plan to apply a thin lacquer coat to help further mitigate against tarnishing. As always, weight and purity are guaranteed by Rare World Metals Mint. Tellurium resists oxidation but it can oxidize, so we suggest storing it in a cool, dry place. Tellurium in the solid form we supply is considered safe though can be toxic if ingested or if powderized or incinerated forms are inhaled. Those with such toxic tellurium exposures often emit a characteristic garlic odor, called tellurium breath, and an equally offensive body odor. It is also known to be teratogenic (keep away from those who are pregnant or potentially pregnant). It's fine turnings and powders can ignite in air and incineration can cause toxic fumes. Please keep this ingot intact and in a safe place. Do not ingest, burn or inhale. Keep it away from children. And, lastly, don't get tellurium breath or your wife and children will keep away from you too, perhaps forever! 
Each ingot will be shipped with an assay certificate and with our velvet logo bag for storage. If you are not completely satisfied with any purchase from us, you have 30 days to return it for a full refund (buyer to pay return shipping). Domestic shipping is free for all orders over $199 (enter code free shipping at checkout). For orders of $199 or under, domestic shipping is $9.95. International shipping is now via USPS international priority express and costs $45 for shipments up to a pound (9 one ounce ingots or less including packaging materials) and $10 for each additional pound.