Stranded Deep

Quickest and easiest way of getting this is to collect 20 rocks by either finding them strewn around an island or finding some ingots. These require a pickaxe to break them down.

Go to your build menu and from the crafting section choose stone tool (Its the top option). It only requires one rock to craft. Rinse and repeat another 40 times.

All tools count towards this. I found this popped naturally for me around Day 18, with standard usage of tools while playing before needing to replace (apart from 2 counts of me losing a tool by accident )

However, as long as you can find enough of the resources (stones, plant fibres, wood etc) you could complete this sooner, but with how slowly these resources replenish you're likely to just be making things harder for yourself if you were to do this!