Float stone

(Arch.) a siliceous stone used to rub stonework or brickwork to a smooth surface.
- Raymond.

See also: Float

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The stones shown in the trailer are Leaf Stone, Dusk Stone, Float Stone and Shiny Stone. This could mean that players will only locate special stones when they explore the small island of PokAaAaAeA@ Pelago.&nbs