Copper - Highly Polished Density Cube 10x10x10mm

Each Copper 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. Size: 10x10x10mm Weight: 8.96g Sample Purity: 99.95% Surface: Mirror Finish *Each cube comes with an InvisiDisplay™ Case. Interesting facts about Copper It is soft, malleable, and ductile. It has high electricalconductivity (59.6×106 S/m). It has the second-highest thermal conductivity (only after silver) among pure metals at room temperature. It’s Oligodynamic, which means it naturally kills germs on contact. The adult body contains between 1.4 and 2.1 mg of copper per kilogram of body weight. Along with gold, it is the only non-greyish pure metal. It takes on its own unique hue (patina) over time and can be “reset” to brilliancy with baking soda and water (or salt and vinegar). Polar Metals seeks to spice up your life with interesting and unusual metals in unexpected w