(mineralogy) Clear quartz crystal containing coloured filaments caused by impurities. Particular kinds are sometimes known as Venus’s hair stone or Thetis’s hair stone.

Barbatula barbatula, a species of ray-finned fish in the family Nemacheilidae or subfamily Nemacheilinae in family Balitoridae (hillstream loaches).

Alternative spelling of freestone

A limestone from the Tithonian stage of the Jurassic period, quarried on the Isle of Portland, Dorset, and used extensively for building in the British Isles.

plural of stone pine

plural of alum stone

(mineralogy) A subsulphate of alumina and potash; alunite.

plural of grindle-stone

(obsolete) A grindstone.

plural of stumbling-stone