Meanings

weight stone (placed on pickles)

standard practice

iron ore

flash

electromagnet

earth and stones

soapstone

stone throwing

keystone

cat's-eye (semiprecious stone)

semiprecious stones

strategic arrangement of go stones at the beginning of a game

paving stone

gem

whetstone

tray-landscape foundation stone

trees and stones

falling rocks

as one would expect

nether millstone