Each of them are found in different ways, so each deserves its own Guide with lists to help you figure out what's missing. The Sims 4 Base Game features 13 types of Collectibles that can be gathered by Sims.
The Sims 4 Collecting Guide Collectible Lists and How to Find Rare Types Metals, Crystals, Trophies, and Fossil Collections are found by Digging
