Himalayan salt lamps have been having a real Moment of late, in part because they're lovely to look at, and also because of the purported health benefits they offer. But another kind of ...

Some of you may have seen these photos....they have been circulating via e-mail over the last few weeks. Pretty amazing....probably the largest selenite (CaSO 4 ·2H 2 O) crystals found, i'd imagine.

IN a former publication 1, an account was given of the examination of the topographical structure of a cleavage face of a selenite crystal, use being made of multiple-beam Fizeau fringes. Only low ...