years ago while excavating on a construction project, some white spherical objects were uncovered several feet down. They were of a ceramic, nature fine, smooth grained and tennis ball sized. There was intense speculation in our news paper on the origin including just which group of native Americans could have created them.
They were sent to university anthropologists and they allowed their differing opinions that pretty much agreed they didn’t know who made them or what they were...... maybe ceremonial.
In the end, an old geezer came and looked at them and declared they were used in an industrial ball mill to produce fine powder from chemical precipitates. Somehow, they had been dumped on the site many years ago
Yup.
Ceramics.
Mostly molten metallic oxides and silicates.
Virtually indestructible and unreactive.
If you had a house in the desert and it burned down, not much would remain.
But your toilet would end up buried in the sand and still be usable a million years from now!