| Emery, carborundum and Alundum wheels are developed from the grindstone of the distant past. |
| Similarly, the edges of hoes and spades will benefit from being sharpened to a reasonably clean edge with a file or carborundum stone. |
| With a diamond, carborundum or zirconia button the photosphere can be as much as one thousand times the volume of the button. |
| A recent exhibit of his work at the Philadelphia Museum of Art featured his carborundum prints, his etchings, lithographs, aquatints and watercolors. |
| Visitors can see how O'Donoghue's painting is informed by his drawings and carborundum prints and vice versa. |
| They are built of enormous blocks of carborundum, and the task of entering the city seemed, to my escort of green warriors, an impossibility. |
