Re-installation is technically simple (as long as the AR coating is not affected by the crystal cement), but requires a couple of items that most owners are not likely to own (or require in the future)
Crystal Cement, Ultra-Violet Activated
This cement hardens when exposed to a UV light source. Best used to glue magnifying lens to mineral glass crystals, since it dries completely clear. Hardens when exposed to sunlight or a UV light. 2 ml bottle
FB-2200
$5.95
Ultra-Violet Lamp
UV lamp for UV glue, always protect your eyes for the rays of the lamp.
110-127 volt
60HZ
8 W
FB-2201
$34.95
They say you can cure the cement in the sunlight, but I think it would take quite some time in very bright light to fully cure. But I guess you could try it as long as you are aware that it may or may not work as well.