The ones I bought were the speckled blue graniteware variety.    From Wordnik.com.  [Plastic Elimination Campaign: Kid's Dishes] Reference

Cook together in a graniteware saucepan one cupful granulated sugar and half a cup of water until it spins a thread.    From Wordnik.com.  [Good Things to Eat as Suggested by Rufus A Collection of Practical Recipes for Preparing Meats, Game, Fowl, Fish, Puddings, Pastries, Etc.] Reference

Put into a graniteware pan one cupful and a half cupful water and cook gently until bubbles begin to rise from bottom.    From Wordnik.com.  [Good Things to Eat as Suggested by Rufus A Collection of Practical Recipes for Preparing Meats, Game, Fowl, Fish, Puddings, Pastries, Etc.] Reference

But I think what you are referring to are Italian style espresso cups in enamel, presumably more decorative than plain graniteware.    From Wordnik.com.  [Plastic Elimination Campaign: Kid's Dishes] Reference

I bought knives, forks, and spoons, graniteware dishes and mugs.    From Wordnik.com.  [The Yellow Peril] Reference

On the table-box was set my graniteware plate, knife, fork, and spoon, a paper napkin, the Prince Albert and the St. Charles.    From Wordnik.com.  [Tenting To-night A Chronicle of Sport and Adventure in Glacier Park and the Cascade Mountains] Reference

Most of this output was thick white graniteware, Rockingham, and stoneware; some of it was decorated, but most of it was plain white.    From Wordnik.com.  [The Story of Porcelain] Reference

The milk was in a clean little graniteware pail, the eggs had been placed in a paper bag, while the other articles were wrapped in pieces of newspaper.    From Wordnik.com.  [The Mucker] Reference

The curio cabinet holds important memories such as a child's graniteware tea set, building blocks belonging to him as a child and a porcelain "Raggedy Ann" sculpture.    From Wordnik.com.  [Local News from The Dispatch | Lexington, NC] Reference

And don't forget Childress True Value Hardware's housewares department, where you will find pressure cookers and gaskets, handy kitchen tools, and a nice selection of graniteware and crocks.    From Wordnik.com.  [The Lubbock Avalanche-Journal:Today's Headlines] Reference

And three bedpans in gray graniteware.    From Wordnik.com.  [The Cat Who Sang For The Birds]