Iridium is one of the rarest elements on Earth. It is a silvery metal element that is one of the densest metals known to man. Iridium is extremely rare in the Earth, and most of the world's iridium supply was deposited here by meteorite, comet, and asteroid impacts. Iridium is 500 times more common in meteorites than on Earth, and the elevated presence of iridium is considered a marker of impact sites or meteorite-related materials. Iridium is not found in meaningful quantities in natural deposits, and most of the world's iridium is created as a by-product of advanced industries such as laser crystals and medical devices. Iridium has an extremely high melting point and is the most corrosion-resistant metal. Because of it's many useful properties, iridium is used in a variety of high-technology applications. The iridium samples I am offering here are industrial leftovers from the creation of crystals for solid state lasers. My source does have any more of this material, and my supply is very limited.
Interesting anecdotes about iridium - the standard mass for determining the exact weight of a kilogram was created in 1889 using an alloy of 90% platinum and 10% iridium. It is kept at the International Bureau of Weights and Measures near Paris. Also, before the discovery of the Chicxulub impact structure, the elevated presence of iridium in the KT-layer sediments around the world helped suggest the theory that a large meteorite impact caused the extinction of the dinosaurs.
Refer to the photos. The black centimeter cube is shown for scale and is not included. You are purchasing a small sample of tiny iridium crystals that is enclosed in a capsule. Your purchase will include a labeled gemjar for safe storage. You also get an card with more information about iridium. Note, each sample of crystals is slightly different and may vary slightly in appearance. The crystals are fine and range in size from shiny grains to silvery dust-like consistency. Each sample weighs approx. 20mg and is large enough to be handled or examined. These are ideal for microscope study and analysis/research.