#semiconductorminerals

Good morning Zambia. Today we reach the part of the quartz series I have been building towards since the beginning.

We have spent four posts talking about quartz as a gemstone. Amethyst. Rose Quartz. Citrine. Smoky Quartz. Tiger's Eye. Aventurine. We have talked about colour and formation and optical phenomena and the beauty of what the earth produces when silicon dioxide crystallises under the right conditions over millions of years.

All of that matters. But none of it is why quartz is one of the most strategically important minerals on earth in 2026.

This post is about that.

Quartz — silicon dioxide — is the foundational raw material of the global electronics industry. It is the starting point for silicon metal, which is the starting point for semiconductors, which are the starting point for every electronic device that exists. Your phone. Your laptop. The processor in the car you drive. The solar panel on the roof. The chip in the satellite overhead. All of them trace their material ancestry back to silicon dioxide. Back to quartz.

The pathway from raw quartz to semiconductor grade silicon is not simple. High purity quartz — with a silicon dioxide content above 99.99% and carefully controlled trace element levels — is processed into polysilicon, which is further refined into monocrystalline silicon, from which semiconductor wafers are cut. The tolerances involved are extraordinary. A semiconductor fabrication plant works at the scale of nanometres. The purity requirements for the quartz that feeds that process are among the strictest of any industrial mineral on earth.

High purity quartz deposits of the quality required by the semiconductor industry are not common. The most significant known deposits are in North Carolina in the United States, in Norway, and in a small number of locations across Brazil and Australia. The global supply chain for high purity quartz is tight, strategically sensitive, and increasingly the subject of geopolitical attention as semiconductor supply chains have become a national security matter for the world's major economies.

But quartz is not only a semiconductor material.

In the solar energy industry, quartz crucibles are essential in the production of monocrystalline silicon ingots from which solar wafers are cut. Without high purity quartz crucibles, solar panel manufacturing at scale is not possible. As the global transition to renewable energy accelerates, demand for high purity quartz rises in direct proportion.

In precision timekeeping, a thin slice of quartz crystal — when subjected to electrical current — vibrates at an extraordinarily precise and consistent frequency. 32,768 oscillations per second in a standard quartz watch crystal. That is what makes the clock in your phone accurate. The piezoelectric property of quartz underpins every piece of electronic timekeeping in the modern world.

Now. Zambia.

The Copperbelt and surrounding geological formations contain significant quartz mineralisation. Quartz veins are documented across multiple exploration licences. The Proterozoic metamorphic and igneous basement complexes that host the copper deposits also host extensive quartz mineralisation. What has not happened, systematically, is the evaluation of Zambian quartz deposits against the purity specifications required by the semiconductor and solar industries. The exploration focus has been copper, cobalt, and gemstones. The quartz has been present and has not been the priority.

I want to leave you with one question this morning.

In a world where high purity quartz is a strategic material — where semiconductor supply chains are a matter of national security for the world's largest economies — what would it mean for Zambia to systematically evaluate its quartz resource base against the specifications that global industry actually requires?

The copper in the ground built this country. What else is in the ground with it?