This the list of Top 5 Heaviest Materials on Earth.
1. Osmium- Density Per Cubic cm: 22.59g 2. Iridium - Density Per Cubic cm: 22.56g 3. Platinum - Density Per Cubic cm: 21.45g 4. Rhenium - Density Per Cubic cm: 21.01g 5. Neptunium - Density Per Cubic cm: 20.47g