"Why not AR both crystals and then reassemble? I just had a glass crystal ARed by chieftang along with a bunch of sapphire crystals and the coating on glass looks identical to my sapphire Overseas crystal. The only extra work, which would take about 2 minutes w/ a felt dremel tim and red polish, would be removing the AR from the top of the glass and bottom of the saphhire. Certainly the extra 40 bucks is worth it to have AR and good mag. A cyclops would cost you about that anyw
sandwich crystal need to be separete, then glue again, how you like to make that???