A discarded microwave may contain 22-carat gold in internal components; study recovered a 450 mg nugget from electronic boards.

Written by Alisson Ficher

Published on 21/06/2026 at 16:59

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Electronic waste discarded at home can hold small amounts of gold in less visible internal parts, such as boards and connectors. The value, however, depends on volume, specialized technology, and proper recycling, not on the home opening of a single device.

Discarded microwaves can contain small fractions of gold in internal electronic components, mainly in boards, contacts, and connectors used for electrical conduction within the device.

Although this presence arouses curiosity, each isolated unit does not represent a fortune ready for extraction, as the economic interest appears mainly when there is large-scale electronic waste recycling.

In the electronics industry, gold is applied at certain points due to its good electrical conductivity and resistance to corrosion, important characteristics for maintaining stable connections over time.

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Gold in microwaves appears in small points

Inside a microwave, gold does not appear as a visible piece, hidden jewel, or nugget ready for sale, but in small layers applied to specific parts of the circuits.

These points can be in the connectors, on the electronic boards, and in areas responsible for maintaining electrical conduction during the operation of the equipment, always in reduced quantities.

Due to its good stability in environments subject to temperature variations, humidity, and wear, the metal helps preserve certain connections over time.

Even with this technical function, the mass of gold present in a single device is usually small, which limits any individual gain and reinforces the importance of collection in volume.

Specialized companies can recover metals like gold, copper, and silver because they work with large batches of electronic scrap, applying industrial separation and treatment processes.

Therefore, the idea that a discarded microwave can yield great value to the consumer needs to be interpreted with caution and without exaggeration.

The financial potential appears when many devices and electronic boards are gathered in professional operations, not in homemade extraction attempts made without proper equipment.

ETH Zurich Research Reinforces the Value of Electronic Waste

The ETH Zurich study drew attention for presenting a route considered sustainable for recovering gold from electronic waste using materials reused from another industrial chain.

According to the Swiss university, the researchers used protein fibril sponges, produced with by-products from the food industry, to retain gold ions in solutions obtained from electronic scrap.

In the experiment disclosed in March 2024, the recovered material was transformed into a small nugget, a result that demonstrated the potential for reusing old electronic boards.

The institution reported that, from 20 old computer motherboards, the researchers obtained 22-carat gold weighing 450 milligrams.

This result helps to gauge the hidden value in discarded equipment, even though the test was not specifically conducted with microwaves.

When gathered in sufficient quantity and treated with appropriate technology, common electronic components can concentrate noble metals capable of returning to the production chain.

Even so, the method presented by the university is part of scientific research and should not be interpreted as an instruction for domestic gold extraction.

Electronic Recycling Reduces Waste of Valuable Metals

The correct disposal of microwaves and other appliances prevents boards, plastics, metals, and potentially hazardous components from being abandoned in common waste or inappropriate areas.

By following the recycling route, high-value materials can return to the industry, reducing waste and decreasing the need for the extraction of new natural resources.

Cell phones, computers, televisions, cameras, and other equipment can also contain small amounts of precious metals, which increases the relevance of specialized collection.

This reuse supports the so-called urban mining, an expression used to describe the recovery of valuable materials from discarded electronic waste.

For the consumer, the safest path is to send unused equipment to collection points, structured cooperatives, manufacturers with reverse logistics, or certified electronic recycling companies.

Besides reducing handling risks, this destination increases the chances that metals, plastics, and other reusable parts are correctly separated.

The interest in the gold present in microwaves reveals less an accessible fortune within each kitchen and more a scale challenge in electronic disposal.

When these devices end up in regular trash, small fractions of valuable metals also end up wasted, along with materials that could be reused through appropriate technical processes.

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A discarded microwave may contain 22-carat gold in internal components; study recovered a 450 mg nugget from electronic boards.

Electronic waste discarded at home can hold small amounts of gold in less visible internal parts, such as boards and connectors. The value, however, depends on volume, specialized technology, and proper recycling, not on the home opening of a single device.

Gold in microwaves appears in small points

ETH Zurich Research Reinforces the Value of Electronic Waste

Electronic Recycling Reduces Waste of Valuable Metals

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A discarded microwave may contain 22-carat gold in internal components; study recovered a 450 mg nugget from electronic boards.

Electronic waste discarded at home can hold small amounts of gold in less visible internal parts, such as boards and connectors. The value, however, depends on volume, specialized technology, and proper recycling, not on the home opening of a single device.

Gold in microwaves appears in small points

ETH Zurich Research Reinforces the Value of Electronic Waste

Electronic Recycling Reduces Waste of Valuable Metals

In the cold desert of Ladakh, where it hardly rains, engineer Sonam Wangchuk created the ice stupa, a tower that freezes winter water and stores it for irrigating crops in the spring, a simple engineering feat that mimics nature.

Libya built over 4,000 kilometers of underground pipelines to bring water from the Sahara to coastal cities in a project that the government itself called the Eighth Wonder of the World.

Chinese woman planted trees for decades while sand buried part of her house, received $5,000 from an American in 1999, and helped transform the desert into a forest of 8 million trees in China.

Desert sand, previously discarded for being too smooth for concrete, becomes an ecological brick in the United Arab Emirates, dispensing with Portland cement, curing at room temperature, and attempting to transform dunes useless for construction into raw material for a new arid engineering.

Almost 6,000 residents live concentrated along a single street nearly 9 km long in the interior of Poland. Houses form a continuous row, and behind them, narrow agricultural strips emerge, creating one of the most unusual rural patterns in Europe.

Described by astronauts as one of the most unlikely natural phenomena on Earth, the Okavango Delta spreads over up to 15,000 square kilometers in the middle of the desert and transforms Botswana into a living labyrinth of channels, islands, and flooded areas.

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