Recipe for SALT is: TEXAS LIMESTONE and STALACTITE. SALT is in consumables category. Better plant this and come back later, it takes some time. You get experiance points for breaking SALT. Hitting it will break it but you need to count the hits yourself. By default you should get at least 1 seed back. Gemratio of SALT is a mystery. Maybe you can check the wiki for <a href="https://growtopia.fandom.com/wiki/Salt">salt</a> Massproducing SALT can be tricky. You will find out after you have harvested a few.