Sedimentary rocks are types of rock that are formed by the accumulation or deposition of small particles and subsequent cementation of mineral or organic particles on the floor of oceans or other bodies of water at the Earth's surface
Unobtainium is rare and hard to find the imaginary impossible element and even if it had a hardness of 11 on the moho scale to form a gemstone of it would be unobtanium itself or the diamond which is the hardest element in the earth with a moho of 10.
