GYPSUM IS FORMED FROM THE EVAPORATION OF HIGHLY SALINE WATERS. IT IS A HYDRATED CALCIUM SULFATE OR CaSO4-2(H2O) AND IS ONE OF THE MORE COMMON MINERALS OF THE SEDIMENTARY FORMATION. SELENITE GYPSUM IS THE OPAQUE TO COLORLESS FORM THAT HAS A "MOON GLOW"APPEARANCE. SATIN SPAR IS A FIBEROUS VARIETY THAT HAS THE ABILITY TO MAGNIFY AND TRANSFER LIGHT. SINCE IT HAS ONLY A HARDNESS OF "2" , IT IS FORMED INTO MANY ENTERTAINING FORMS --EGGS, TOWERS, BALLS, WANDS, AND SHEETS ARE A FEW. SELENITE IS SAID TO HAVE MANY METAPHYSICAL PROPERTIES. IN THE FOLLOWING PAGES OF SELENITES YOU WILL FIND SOME VERY SHOWY SELECTIONS FOR YOUR HOME, OFFICE, AND COLLECTION. THEY ALSO MAKE WONDERFUL GIFTS.