Natural stone impregnated with photoluminescent rare earth elements or compounds such that the stone emits fluorescent light after exposure to natural or artificial light of shorter wavelength and higher energy, and this emitted fluorescent light is particularly noticeable at night; stone for building and construction; stone sculptures; stone veneers; stones; building stone; engraved and cut stone plaques; figurines of stone; grave markers of stone; memorial plaques of stone; monument stone; monuments of stone; mosaics made of natural stone and stone tile; natural stone and stone tile; natural stone slabs and tiles; natural stones that are inscribed with a name, quotation and/or phrase; non-precious stones for garden or ornamental use; paving stone; pool surrounds made of stone; statues of stone; statuettes of stone; tombstones of stone; wall stone; wall and floor art made of natural stone and stone tile; works of art of stone, all of the foregoing comprised of natural stone impregnated with photoluminescent rare earth elements or compounds such that the stone emits fluorescent light after exposure to natural or artificial light of shorter wavelength and higher energy, and this emitted fluorescent light is particularly noticeable at night