Dumbbells can be made from a large number of materials. Usually, they consist of cast iron, coated with rubber, neoprene or paint, according to Adamant Barbell. However, they can also be made with many other materials, including concrete.Know More
Adamant Barbell explains that hex dumbbells are made out of cast iron, and rubber hex dumbbells are the same, but coated with rubber. Pro style dumbbells are made of solid steel and rubber pro style dumbbells are, again, just coated with rubber.
Dumbbells can be made, at home, by filling milk bottles with concrete, sand, rocks or water. However, this homemade equipment should be used carefully to avoid injuries.Learn more about Home Fitness Equipment
The Pantheon, a 1,900-year-old Roman temple containing the world's largest free-standing dome, is made primarily of concrete, volcanic rock and granite. The most remarkable part, the rotunda and dome, is made of concrete that includes lightweight pumice as part of the aggregate.Full Answer >
Jewelry is most commonly made with metals such as gold, platinum, titanium, silver and stainless steel. Gold, silver and platinum are classified as precious metals, making them more valuable and desirable because they are less reactive, possess a higher luster and are easier to work with than most metals.Full Answer >
Bricks are made from fired clay, manganese, barium and barium carbonate. The raw materials are combined and formed into bricks and then fired in a kiln.Full Answer >
Mobile phone parts are made from a combination of rare earth elements and plastics. Rare earth elements are used to create the glass display, magnets in speakers, headphones and vibrating motors in cell phones, according to PBS.Full Answer >