I taught HS science for many years and it was impossible to mention “silicon” and not talk about “silicone” because, well, adolescent boys, and well, consumer society and the media.
I know adults who call that high-tech zone in the SF Bay Area “Silicone” Valley instead of “Silicon” Valley and are unaware of the difference. If they think about it at all, which would surprise me, they think computer chips are made from the same stuff as breast implants.
Silicon is an element. Number 14. It’s not really a metal. It’s not really a non-metal. It’s somewhere in between and was often called a “semi-metal” or even the much nicer “metalloid.” The pure stuff is light and brittle, but you can’t find the pure stuff in nature. In nature, silicon is bound up in rocks. The most abundant rock-forming minerals on earth are made of compounds of silicon and are called silicates. The simplest of these is called silica and you know it as quartz.
Silica is a compound of silicon and oxygen. So is silicone, by the way. But the atoms are arranged differently and thus the substances have different properties. Silica is tetrahedral, and these pieces interlock in a variety of ways to make crystals. Silicone is a linear polymer and it behaves more like a hydrocarbon plastic. In sci-fi, aliens are often made of silicon because the atom, like carbon directly above it, is tetra-valent (makes four bonds). The delightful Dr. Angela Collier (“does physics”) has a great YouTube of why such creatures wouldn’t/couldn’t work. Regardless, silicon is all around us in the earth’s crust. Nature put it there, and we clever humans have figured out some uses (like silicone, for example).
But the profoundest use of silicon is why we call it Silicon Valley and that’s in electronics. These days silicon is called a semiconductor because that property makes it special. It is sort of a conductor and sort of an insulator (non-conductor). If you get really pure silicon, you can then add other materials to change the conductivity, a process called “doping.” Computer chips are made mostly of doped silicon.
This is our world. Once we figured how to use semiconductors everything changed. The transistor was invented in the 1950s and by the 1960s the integrated circuit was ubiquitous. Now we live with semiconductor devices embedded into almost all of our daily activities. We live in a silicon world. To make chips we need really pure silica, which is all over the world in beach sands. But not all beach sands are created equally, and some sands are better than others as raw materials for chip fabrication. So even a super-abundant natural resource has supply constraints!

I found this picture on a Chinese website (China Silicon Metal Producers) which claims that China supplies 80% of the world’s silicon.
Silicon is the primary material in solar panels, by the way. It is also used in aluminum alloys which are used everywhere, particularly in automobiles.
I find it very scary to live in the Silicon Age. For all its benefits the downsides are too great. The mobile phone and social media, silicon-enabled technologies, are socially corrosive. The internet will never give you the joy of reading a good book, and the old days of the anarchic internet are gone, replaced by corporate gate-keeping. We are forced to adopt technologies we don’t need or risk being squeezed out of the global economy. To our TechBro Masters we are not customers or clients or patrons but simply “users” which is what drug dealers call their buyers.
I think the only sensible thing is to be a Luddite. Now, Luddites were NOT dumb reactionaries. They saw that automation would destroy not just their livelihoods but re-shape their entire way of life. They didn’t like the way technology was imposed upon them by their overlords. They were not anti-technolgy and in fact many original Luddites were technically skilled workers who understood only too well their precarious position in the capitalist world. (q.v. Understanding the Luddites, h/t Erik Loomis)
The printed word was once a technological marvel. Now it is “old school” and being replaced by LCD screens. They aren’t the same. The screen is it’s own thing. It is not a book, a paper, a pamphlet, a circular, a broadsheet, a bulletin, a newsletter, or a magazine. It is something else. That’s OK, I like new things. But they are NOT the old thing and do NOT “replace” it!
Let’s see if we can remember that.










