Steel Age (1800 - 1940. The development of mass-produced steel of high quality, and its widespread adoption and use in construction and by industry.)
Aluminum Age (1940 - 1965. Tremendous growth in the aeronautical and space industries, enabled by the futuristic light alloy.)
Plastics Age (1965 - 1985. Ubiquitization of lightweight, durable plastics in all forms of consumer goods and media. The M-16 "plastic rifle" and the polycarbonate compact disc are symbolic of this era.)
Silicon Age (1985 - 2023. The age of computers in everything, the internet, "smart" devices, gig economy, etc.)
LK-99 Age (2023 - ??. Could end next week, could last a while. Nobody knows.)
Bronze Age
Iron Age
LK-99 Age
(source: https://news.ycombinator.com/item?id=36869209)