graniteware
noun
gran·ite·ware ˈgra-nət-ˌwer 
: ironware with grayish or bluish mottled enamel
Example Sentences
Recent Examples on the Web Homegrown tomatoes, green beans, and corn – in addition to the vegetables cooked with the original roast – filled a large graniteware pot. 
Carolyn Hall, The Christian Science Monitor, 8 Mar. 2022
Carolyn Hall, The Christian Science Monitor, 8 Mar. 2022 Word History
First Known Use
1878, in the meaning defined above