Thulium metal ingot - one troy ounce - .995 bullion Discovered by the Swedish chemist Per Theodor Cleve in 1879 at about the same time he was credited with discovering holmium, thulium is the second most rare of the rare earth elements behind promethium. As promethium is radioactive and will not be one of our products, thulium is the rarest of our rare earth series. Despite it's rarity and cost, there are important industrial uses of thulium in solid state lasers and x-ray machines. Inscribed on our ingots are the chemical symbol (Tm), purity (99.5%), 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, similar to the one pictured. There can be tiny edge dings, light surface scratches, occasionally a shallow cutter groove on the edge of several of these ingots, and other small imperfections which do not detract from the inherent value of this rare metal. Though not among the more oxidation prone rare earth metals they will oxidize over time. They can frankly corrode if exposed to water or if stored at high humidity. As always, weight and purity are guaranteed by Rare World Metals Mint. 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 every shipment will include our velvet logo bag. 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 via DHL, FedEx, or USPS international 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. International customers please be aware that your country may levy import duties and/or VAT taxes on your purchase from us. We have nothing to do with this and cannot pay it for you. If you refuse our package because of this extra cost we will take it back and will refund your order in full once received minus the cost of the return shipping. If you are unsure what these import costs will be please check with your country's customs office. http://en.wikipedia.org/wiki/Thulium http://en.wikipedia.org/wiki/Abundance_of_elements_in_Earth%27s_crusthttps://nora.nerc.ac.uk/id/eprint/513472/1/Risk_List_2015_FINAL.pdf
