Check the store for MARS ROCK. Or maybe you need to do some research how to get this item. This item belongs to terrain category. MARS ROCK gives experience points when broken. Hitting it will break it but you need to count the hits yourself. You get at least 1 seed back (maybe more!) from splicing MARS ROCK. Gemratio of MARS ROCK is a mystery. Maybe you can check the wiki for <a href="https://growtopia.fandom.com/wiki/Mars_Rock">mars rock</a> Blockratio of MARS ROCK is a mystery. Maybe you can check the wiki for <a href="https://growtopia.fandom.com/wiki/Mars_Rock">mars rock</a>