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While we often view precious metals and gemstones as mere accessories for celebrities or hoarded treasures for dragons, these materials have some truly unexpected and fascinating uses. Here are ten of the most surprising applications.
10. Silver Keeps Your Socks Fresh
Did you know your socks could contain silver? Beyond its well-known uses in dentistry, jewelry, optics, and photography, silver possesses powerful antibacterial qualities. It can prevent bacteria and fungi from thriving in fabrics, effectively stopping unpleasant odors. Thanks to this, silver in its nanosilver form is widely used in the textile industry to make clothing, including socks and shoes, odor-resistant. Moreover, silver’s antibacterial properties have also made it a highly valued material in medicine, where it’s used as a potent disinfectant and antiseptic.
9. Sapphire Invisible to Infrared Cameras
Sapphire, renowned as the second hardest natural gemstone, is often seen merely as a stunning jewelry piece. However, its striking blue hue conceals a remarkable ability in a highly specialized domain: the infrared spectrum. Sapphire is key in creating some of the most powerful infrared lasers. Even more impressively, when specially treated, sapphires can completely absorb infrared light, rendering them invisible to infrared sensors. This property makes it possible to coat objects—like vehicles or even clothing—with a sapphire compound that can render them undetectable by infrared cameras.
8. Palladium Enhancing Fuel Cells
Palladium is a close relative of platinum. It's commonly used in jewelry, both on its own and as a component of white gold. But palladium’s role extends far beyond its aesthetic appeal. The metal is highly efficient at absorbing hydrogen, making it a critical element in the development of fuel cell technology.
In fact, palladium is believed to be the key to advancing fuel cell technology, offering the potential for both more efficient and, crucially, more affordable fuel cells. This could lead to the creation of greener machines at a time when our fuel resources are increasingly scarce.
7. Iridium A Rare and Precious Metal in Watches and Spark Plugs
Iridium is one of the rarest and most valuable metals, with only three tons produced each year. A simple ring made from this silvery-white metal can cost so much that jewelers won’t even display the price online. Despite its preciousness, iridium has practical, everyday applications. It is one of the few materials that can withstand extreme heat and resist corrosion. It requires temperatures above 3632°F (2000°C) to melt. This remarkable durability has made it useful in various high-pressure, small-scale devices. When alloyed with other metals, iridium is used in creating spark plugs, crucibles, compass bearings, and wristwatches. Even fountain pen tips are made from it.
6. Diamonds The Unsung Heroes of Industry
Not all diamonds are the sparkling gems we admire in jewelry. Most are rough, dark chunks unsuitable for engagement rings. Yet these diamonds still hold immense value. The industrial sector grinds them into powder and uses the dust to coat cutting tools such as saw blades, drill bits, and grinding wheels, creating ultra-effective tools capable of cutting through almost anything. Diamonds also serve in the creation of heat sinks, durable windows, and high-quality speakers. In the scientific world, diamonds are indispensable: they’re used to craft lasers and specialized anvil cells that simulate the extreme gravity of distant planets.
5. Rhodium Essential in Catalytic Converters
Rhodium is a less commonly recognized precious metal, but that doesn't mean it's any less valuable. Often mixed with platinum to reduce costs, rhodium is used in jewelry, typically as a thin, protective coating over softer alloys like sterling silver or white gold. However, its most significant role is quite surprising: it’s found in the exhaust systems of our cars.
Most rhodium is used in catalytic converters because it is one of the few materials capable of handling the extreme conditions of the process. Although the valuable materials inside these emission-reducing devices are unknown to many, thieves are aware of their worth. This has led to a rise in catalytic converter theft in many regions around the world.
4. Beryllium The Super Metal Behind US Military Power
Beryllium is a rare white-gray metal, not only scarce on Earth but nearly nonexistent across the universe—except in the United States, which is fortunate enough to have its own beryllium deposit. Many precious stones, such as emeralds, cat's eye gems, and aquamarines, are made from beryllium, but its uses go far beyond that. Beryllium is also a critical component in constructing missiles, high-altitude planes, spacecraft, and satellites. Even CERN's Large Hadron Collider, the world's largest scientific facility, relies heavily on this rare metal. Beryllium also plays a significant role in the military, being integral to numerous military vehicles and systems, including nuclear devices. The Department of Defense has stated: “Beryllium is essential for important defense systems and unique in the function it performs.”
3. Gold The Internet and Beyond
Gold is the iconic precious metal. While it may not be the rarest or most expensive, it remains the most highly respected. This esteem is reflected in its vast array of uses, far beyond mere adornment. Gold is truly one of the most versatile materials on Earth.
Beyond its obvious roles in jewelry, currency, and dentistry, gold is found in nearly every aspect of modern life. For example, vast quantities of gold are used in the physical infrastructure of the Internet—wiring and computers rely heavily on it. Gold also plays a key role in fields such as printing, photography, spacecraft, cooking, jet engines, nanotechnology, paints, and medicine. And these are just the uses we already know. Science is only beginning to explore the full potential of gold. For instance, we’ve recently discovered that pure gold injections can ease arthritis—but the mechanism behind this remains a mystery.
2. Platinum A Potential Cancer Treatment
Platinum is one of the few precious metals that radiates an air of luxury even surpassing gold. Its subtle, silvery hue appeals to those who dislike the bright yellow of gold but find silver too ordinary. However, platinum is much more than just a jewelry material—it has remarkable medical applications, such as in cancer treatment. The platinum-based drug cisplatin is one of the world’s top cancer-fighting medications. For certain cancers, particularly testicular cancer, cisplatin has a cure rate of eighty-five percent, compared to the usual ten percent survival rate for the condition.
1. Pearls A Beauty and Health Elixir
While pearls are primarily associated with jewelry in the West, in Asia, ground pearls (often referred to as pearl powder) are a prized component in a variety of medical and skincare products, particularly those targeting acne and high-end beauty treatments. Beyond skincare, pearl powder has a wide range of uses: it’s found in toothpaste alternatives, calcium supplements, and stomach medicines. It’s even believed to help reduce ulcers and sores. Who would have thought?
