Selenite rhymes with:
franklinite, franklinite, ammonite, basnight, bauknight, bentonite, canaanite, clintonite, finite, fortnight, franklinite, goodnight, hignight, hignite, lignite, limonite, maronite, masonite, mennonite, midnight, monzonite, newsnight, reaganite, samsonite, suburbanite, unite, urbanite, whitenight
Selenite sounds like:
salant, salient, salinity, salmond, schlund, schoolmate, sealand, sealant, selinda, selland, shelnutt, silent, skoglund, slammed, slant, slanted, slimmed, soland, solemnity, squillante, succulent, swaziland