By the start of the 20th century, Sylacauga quarries had an established reputation, and shipments were being made throughout the state. Although structural marble was being produced to some extent, a very lucrative use of marble was found in the steel industry. More and more of the Sylacauga deposits were being blasted and used for fluxing steel. Later dolomite replaced marble in this process. In spite of the approaching depression, the late 1920s and early 1930s were times of spectacular growth for Sylacauga's marble industry.