There is a quiet trend picking up steam online right now. People are cracking open their old smartphones, pulling apart circuit boards, and recovering the tiny amounts of gold and other precious metals hidden inside. It sounds a little extreme, but it makes a surprising amount of sense, and it is part of a much bigger shift in how everyday people are thinking about electronics recycling.
The Gold Is Real, and So Is the Trend
If you have ever heard the term “urban mining,” this is what it refers to. Instead of extracting metals from the earth through traditional mining, urban mining recovers those same materials from the electronics already sitting in our homes and offices. The concept has been around for decades, but it has been gaining serious mainstream attention lately, driven by rising gold prices, growing public awareness about e-waste, and a wave of DIY content online showing exactly how the process works.
So what are we actually talking about when it comes to precious metals in your phone? According to the U.S. Geological Survey, a typical smartphone contains about 0.034 grams of gold, which at current market prices is worth roughly a couple of dollars per device. That number seems small until you zoom out. One million recycled smartphones can yield over 34 kilograms of gold, worth millions of dollars at current market prices.
Gold is used in phones because of its reliability. It is primarily found in the circuit board, also known as the motherboard, where it is used in the connectors of integrated circuits and memory chips. Gold is valued because it conducts electricity well and resists corrosion. Most of the gold is in the printed circuit board, and some phones can have up to 36 milligrams.
Older devices are actually a better haul than newer ones. A 1990s computer board can yield between 1 and 5 grams of gold, while a modern smartphone contains only about 0.034 grams. E-waste contains substantially more gold than mined ore, with estimates suggesting up to 800 times more concentration. High-end desktop computers and server-grade motherboards may contain up to 1 gram of gold, compared to the fraction of a gram in a smartphone, because these larger devices require more powerful and reliable components.
Urban Mining Is Going Mainstream
The idea that recycling can have real economic value is no longer niche. The “urban mining” concept, where we reclaim metals from existing products at end of life rather than digging new ore, is now mainstream. A Chemical and Engineering News report often cited in the industry notes that 1 metric ton of printed circuit boards can contain at least around 200 kg of copper, 0.4 kg of silver, and 0.09 kg of gold, at concentrations many times higher than in natural ores.
Part of what is driving the trend is just how bad the current situation is. The number of mobile phones discarded globally is projected to reach over 1.5 billion in 2025, with only 18% being properly recycled. Global e-waste generation is expected to grow from 65.3 million metric tons in 2025 to 74.7 million metric tons by 2030. All of that material, and most of the valuable metals inside it, ends up buried or burned instead of recovered.
Researchers are also developing new extraction methods that are safer and more efficient than the older chemical approaches. A recently developed process achieves over 98.2 percent gold leaching efficiency from waste CPUs and printed circuit boards at room temperature, and processing 10 kilograms of discarded circuit boards can yield around 1.4 grams of gold at a total cost well below current market rates.
What DIY Urban Mining Actually Looks Like
So what does someone actually do at home? Here is a general overview of how hobbyists and small-scale enthusiasts are approaching this. It is worth noting that full chemical recovery is not something most people can or should attempt at home, but the disassembly and sorting side of things is accessible to anyone.
Step 1: Collect and Sort Your Devices
The first step is gathering old electronics. Phones, laptops, desktop motherboards, old CPUs, and even older gaming hardware are all worth looking at. As mentioned, older devices tend to have more recoverable metal. Server boards and older desktop motherboards are particularly valuable if you can find them.
Step 2: Disassemble and Identify High-Value Components
The first step in any recycling process involves disassembling the electronic device into smaller components and removing hazardous parts. These components can then be sorted into materials for recycling and other metal-containing fractions, such as printed circuit boards. The disassembling process typically requires intensive manual sorting before moving on to further steps.
For DIY purposes, this means carefully taking apart devices and setting aside the circuit boards, edge connectors, memory sticks, and CPU chips. Gold is concentrated in specific areas, including edge connectors, which are the gold-plated fingers along the edges of boards like RAM modules, integrated circuit pins, bonding wires inside chips, and surface finishes using processes like electroless nickel immersion gold.
Step 3: Understand the Chemistry (and Its Limits)
Full gold extraction at home typically involves chemical leaching solutions, and this is where most hobbyists either stop or hand off to a professional refiner. Traditionally, extracting gold from electronics required hazardous chemicals like cyanide, which carry serious environmental and health risks. Newer research is changing this, but home processing still requires caution, proper ventilation, protective equipment, and a solid understanding of what you are working with.
Step 4: Know When to Send It Out
While recovering gold from circuit boards is technically possible, it is generally not economically viable for individuals or small-scale operations due to the processing costs and required volumes. Professional refiners typically require at least 500 grams of gold-bearing material to make recovery economically viable. For most people, the more practical move is to collect and sort the high-value components and then send them to a certified refiner or recycler who can process them properly.
Why This Matters Beyond the Hobby
Even if you never crack open a single phone yourself, the fact that this conversation is happening is genuinely good for the environment. Every device that gets disassembled and properly processed is one less device sitting in a landfill leaching lead, cadmium, and mercury into the soil. The metals recovered from those devices also reduce the demand for new mining, which is one of the more destructive industrial activities on the planet.
Electronics contain precious metals at concentrations up to 50 times higher than those found in natural ores. A single ton of electronic waste contains up to 100 times more gold than the same amount of gold ore, making discarded electronics a literal gold mine waiting to be tapped.
Recycling is not just a good idea anymore. It is becoming something people are excited about, and that is a shift worth paying attention to.
Recycle Your Electronics in Utah
If you have old electronics piling up and you want to make sure they are handled responsibly, Recycle IT Utah serves Salt Lake, Davis, Weber, and Utah counties. Whether you have a drawer full of old phones or an office full of outdated equipment, we can help make sure those materials are recycled properly instead of ending up in a landfill.
Visit recycleitutah.com to learn more or schedule a drop-off.
References
- Accio. (2025, October 12). Mobile phone scrap trends: 2025 insights and market growth.https://www.accio.com/business/mobile-phone-scrap-trends
- APMEX. (2025). How much gold is in a cell phone? https://learn.apmex.com/answers/how-much-gold-is-in-a-cell-phone/
- Alchemie Labs. (2026, March 2). Gold in electronic waste: 4 reasons why urban mining is surging.https://alchemielabs.com/gold-in-electronic-waste-urban-mining-recovery/
- Andwin Circuits. (2025). How much gold is present on circuit boards? https://www.andwinpcb.com/how-much-gold-is-present-on-circuit-boards/
- American Bullion. (2024). How much gold is in a cell phone? https://www.americanbullion.com/how-much-gold-is-in-a-cell-phone/
- BGR. (2025, October 27). How much gold is actually in your smartphone? https://www.bgr.com/2004508/how-much-gold-in-average-smartphone-explained/
- EMEW. (2025). Precious metals recovery from e-waste. https://emew.com/blog/precious-metals-recovery-from-e-waste
- Interesting Engineering. (2026, January 8). Chinese method recovers 98% of gold from old phones in 20 minutes.https://interestingengineering.com/science/chinese-method-recovers-gold-old-phones
- Le Ravi. (2025, November 1). Most people throw it away, but it contains 22-karat gold worth thousands of dollars. https://www.leravi.org
- Okon Recycling. (2025, October 11). Urban mining and metal recovery: turning e-waste into a sustainable resource. https://www.okonrecycling.com/industrial-scrap-metal-recycling/specialty-metals/urban-mining-metal-recovery/
- Phoenix Refining. (2025, October 2). Why older electronics contain more gold.https://www.phoenixrefining.com/blog/why-older-electronics-contain-more-gold