Terbium (Tb)


Terbium metal ingot - 1.25 troy ounces - .995 bullion


Discovered in Sweden in 1843 by chemist Carl Gustaf Mosander, terbium is a malleable, ductile, silvery white rare earth metal. It is never found as a free element in nature, but is contained as a small component in several minerals including monazite and euxenite where its concentration varies between 0.03% and 1%. Terbium, along with iron and dysprosium make up Terfenol-D which expands and contracts in a magnetic field more than any other metal. It is used in solid state electronics, florescent lamps, trichromatic lighting, TV tubes, fuel cells, and sonar systems. The vast majority of terbium is mined in China and it, along with the other rare earth metals, sit atop of the British Geologic Survey's risk list.

Inscribed on our ingots are the chemical symbol (Tb), purity (99.5%), weight (1.25 troy ounces), and a serial number (this number is unique and will vary). On the reverse is our logo. These ingots are lightly polished, similar to the one pictured. There can be tiny edge dings, light surface scratches, and other small imperfections which do not detract from the inherent value of this rare earth metal. As always, weight and purity are guaranteed by Rare World Metals Mint. Though among the more oxidation resistant of the rare earth metals they will oxidize over time. Please keep them intact in a cool and dry place, do not ingest, and keep out of the reach of children. 

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.







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