On Fjordur there is a cave called The Shimmering Halls located at 12.5 62.6. In this cave you can harvest polymer from boxes that spawn by a anvil found in the cave. There is a bridge that goes straight and right. It is on the right. These boxes respawn and give you polymer, metal, and obsidian.
ARK MOBILE: This method is preferable for single player as youll receive 100% of your materials back if you destroy a structure. What you want to do is grab yourself some clubs and go kill as many penguins as you can for organic polymer. You then want to place that organic polymer in a fabricator and make vaults - I typically do around 4- Destroy them and instead of recieving organic polymer, it’ll be converted to regular polymer. Repeat the process :D
U will need this all the time once u get a fabricator and u need obsidian and segmenting paste and personal I found it hard to kill animals for like 4 keratin so if ur on the island go in between the snow area and redwood forest and u will see a Rivar there will be some dams now if u haven’t looked in the dams then u will be rich but if u look in the m often then u won’t have as much
Get an argy and anky and go to a place where there is a lot of obsidian nodes and smack away with you anky and then put the obsidian in your argy because of the weight reduction and fly back to base. I have gotten 4 stacks at a time with this method.
My organic-to-regular polymer farm on Mobile Casual: Bed, grinder and fabricator at obelisk. Beds in snow/strong and swamp/immune caves. Die, respawn in caves for artifacts, and tribute to get compound bows, gas masks, riot shield, scuba tank. Grind (one at a time, remove resources!) to get tons of organic polymer. Fabricate Fridge or Industrial Cooker, then place and destroy, over and over. Just be sure to remove regular polymer from fabricator and store, because it gets used first.