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Solid Osmium Density Cube 10mm

Elemental metallic 1 cm elemental cubes

These highly polished cubes are great educational tools


Each cube is polished by hand and laser engraved with its periodic info.

  • Size: 10x10x10mm
  • Weight: 19.6g
  • Sample Purity: 99.95%
  • Surface: Mirror Finish

Don't Miss Out!

We have only a few prototype cubes of pure 99.95% osmium!

Our cubes elements are rare, naturally occurring metallic chemical elements of high economic value. The demand for precious metals is driven not only by their practical use but also by their role as investments and a store of value.

Osmium cube is extremely difficult and expensive to make. With its signature blue tint and insane density, it's a must-have for the serious metals collector. It's the first time we've offered Osmium as a cube because generally, it's too difficult to work with.

Each Osmium cube is solid and of high purity of 99.95%, highly polished by hand for many hours to reach a mirror finish, and laser engraved with its periodic info.This is an heirloom piece that will last forever.

*Each precious cube comes with a premium steel container with a glass window.

Polar Metals seeks to spice up your life with interesting and unusual metals in unexpected ways. The elements on the periodic table are everywhere, in fact, they make up everything! So far, we have brought 29 Elements to you: Silver, Silicon, Germanium, Nickel, Chromium, Zinc, Niobium, Tantalum, Hafnium, Rhenium, Thulium, Lutetium, Scandium, Ruthenium, Platinum, Palladium, Gold, Iridium, Osmium, Titanium, Cobalt, Magnesium, Zirconium, Molybdenum, Copper, Aluminum, Carbon, Iron and Tungsten.

*Note: Please wear gloves when handling.

Customer Reviews

Based on 3 reviews
William Ross
Densest element in the universe

I am very happy with my cubic centimeter of the densest element in the universe, Osmium. The sample weighed in at 22.6 grams, as advertised. By contrast, Magnesium weighs only 1.7 grams for the same sized cube, and Lead weighs 11.3 grams. The Osmium cube came elegantly displayed in a metal container with a glass top window. I appreciate the difficulty involved in working this metal into a precise cube of one centimeter because of it’s hardness and toxicity when fine particles are created if milled and polished. The package arrived in a timely manner, considering it was shipped from the PRC, but was held up for two days by US Customs, Homeland Security for some reason. They saw fit to open the package for examination, but did not break the seal on the smaller black box containing the Osmium. Customs gave it all their seal of approval, and UPS made it easy to track it on it’s journey. The kind folks at Krinite and Polar Metals also included a beautiful free sample of Bismuth metal crystal in a nice display.


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