cerium

This is quite similar to some lanthanide (4f) elements like cerium, which also show strange variety of allotropes.

Grinding materials included abrasives such as jeweler's rouge, cerium oxide, commercial polishes such as Brasso and Silvo and even HF solution.

Also, Cerium mimics how the ls command lists a directory that has entries with quotes.

If one adds some magnesium or cerium to the alloy, the graphite precipitates out as spherical nodules rather than feathery dendrites.

However, as Cerium noted earlier, many business costs do tend to scale with the price of goods, making this difficult without impacting profitability.

They were apparently developed at MIT with cerium sulfide, a compound I'd never heard of before.

Also Cerium is a rare earth, even though quite widespread.

Build a structure made of CeO₂ (ceria = Cerium Oxide).

This was the most interesting bit (imo): The intriguing thing about both neodymium and cerium is that while they’re called rare earth minerals, they're actually fairly common.

The next UI direction for iOS should be coloured or textured glass (with bubbles or glass block refraction) with dark mode options that mimic uranium- or cerium-doped glass.

Arguably, what makes it, and cerium, scarce enough to be profitable are the hugely hazardous and toxic process needed to extract them from ore and to refine them into usable products.

For example, cerium is extracted by crushing mineral mixtures and dissolving them in sulphuric and nitric acid, and this has to be done on a huge industrial scale, resulting in a vast amount of poisonous waste as a byproduct.

From wikipedia: "Monazite is a reddish-brown phosphate mineral containing rare earth metals and is an important source of thorium, lanthanum, and cerium.

Cerium compounds, like the ceria used here, can be significantly cheaper than the metal (because the metal requires a lot of energy for extraction).

Cerium supports searching for files with the --find option which allows blog patterns, and also filemagic with the --magic option (enabled with the magic feature).

Cerium is common in solar coverglass used in space, but I'm not sure I've heard of it being used for terrestrial applications.