Ironstone Bead is usually compromise with a sedimentary mineral, which means that it was produced over the period of time through sediment growth. More particularly, ironstone is a variety of element sedimentary rock, as its structure is based on liquefied sediments, which being deposited in a concrete form from a solution.
In fact, the combination of oxygen and iron in such solution creates the solidity of the ironstone. This is due to its high-levels of iron compounds established within the stone. Also, its various elements provide a more specific indication to the weight and mass of iron.