From this page you can find all awesome stuff that you can create with BOULDER. BOULDER is in building category. BOULDER gives experience points when broken. BOULDER can be broken. By default you should get at least 1 seed back. Gemratio of BOULDER is a mystery. Maybe you can check the wiki for <a href="https://growtopia.fandom.com/wiki/Boulder">boulder</a> Will you get enough blocks to build something? You just have to find out yourself.