The Story of Marble: From Rock to Refinement Marble forms deep underground when limestone transforms under heat and pressure over millions of years. Its colors and veins come from minerals like iron (red) or serpentine (green). **Quarrying:** Miners cut giant blocks from mountains using diamond wires and saws. Famous sources include Carrara (Italy) and Afyon (Turkey). **Processing:** Blocks are sliced into slabs, polished to a shine, and sealed for durability. Some become countertops; others are