buhrstone, also burrstone /bûrˈstōn/

1. A variety of quartz, containing many small empty cells, which give it a roughness of surface particularly adapted for millstones
2. A millstone made of this

• inverted pleat
• inverted pleats
• inverted snob
• inverted snobbery
• inverted snobs
• inverted turn
• inverter
• inverters
• invertibility
• invertible
• invertin
• inverting
• invertins
• invertor
• invertors
• inverts
• invert sugar
• invert sugars
• in very deed
• invest
• investable
• invested
• investible
• investigable
• investigate