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A stone or thick lump of glass, or kind of pestle, flat at the bottom, used for grinding pigments or drugs, etc., upon a slab of similar material.
a heavy tool of stone or iron (usually with a flat base and a handle) that is used to grind and mix material (as grain or drugs or pigments) against a slab of stone
a small stone having one or more flat surfaces for the grinding of material while the mortar is a larger flat rock
a stone to crush/pulverize matter on
a tool usually glass that has a handle and a flat bottom
Stone, glass or metal tool for grinding pigment in oil when making ink or paint.
A flat-based ground-glass pestle for grinding pigments and gesso ingredients on a ground-glass or stone slab.
Small hand mill made of glass or marble for grinding paint powder very finely on a ground glass pallette
Metal, glass or stone block use in grinding pigments.
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