How can you find DEEP ROCK? Because you cannot make it from other seeds. DEEP ROCK belongs to terrain category. Received experience is a mystery. Keep an eye out for the exp counter. How many times you need to hit it? Head to the wiki for more info: <a href="https://growtopia.fandom.com/wiki/Deep_Rock">deep rock</a> By default you should get at least 1 seed back. Will you strike it rich? You just have to count the gems yourself. Will you get enough blocks to build something? You just have to find out yourself.