Turning copper coins into 'silver' and 'gold', Experiment

Perform what looks like alchemy with ordinary copper coins in this teacher demonstration. Includes kit list and safety instructions.

Microstructure and chemical composition of Roman orichalcum coins emitted after the monetary reform of Augustus (23 B.C.)

coworker found a silver penny : r/mildlyinteresting

Chemical Reactions: Make a Penny Turn Green (with free printable) - Buggy and Buddy

How to Rust a Penny

What Color is Your Copper Coin? - Grading Them

A Brief History of the Nickel, History

Turn Copper Pennies Into Silver and Gold Pennies

Gold' coins on a microscale, 14–16 years, Experiment

Cool Science for Kids with Pennies

What Are Off-Metal Coins? - Grand Rapids Coins

Coin - Wikipedia