In the video above, Alfredo Petrov shows Justin Zzyzx an Aragonite with Gypsum from Spain that has been dipped into Copper Sulfate, turning the Aragonite EMERALD COLORED!, as if it were pseudomorphed into Malachite. Very pretty, but very fake!

You can buy a bucket of Applied Bio Chemists Aquarium COPPER SULFATE 5 lb and experiment with calcite and other minerals turning different colors and grow some of your own crystals. It is a lot of fun, but don’t sell the end product as a legit mineral!