The vacuum coating process is applied to the opposite side of the stone (e.g. CAL V on the back; VM V on the front).
Only a part of the stone is vacuum coated (e.g. Crystal Helio Z).
Three surfaces of a cube are vacuum coated (e.g. VM B)
Both sides of the stone are vacuum coated (e.g. Crystal AB 2x)
This product was added to our catalog on Sunday 21 October, 2007.