Every London Antwerp Diamonds diamond can be sealed in a plastic holder together with
a microfilm of the certificate. Not only does the sealing keep the diamond safe
from damage, grease and dirt, it is also a guarantee that a given certificate
and the accompanying stone actually belong together.
two layers of the sealing, i.e. the upper window and the bottom card, are held
together with a special pressure-sensitive transparent adhesive to assure that
the elements are irreversibly bonded. When opening the sealing, the printed pattern
on the bottom card will be disrupted
material used for the window is clear, colourless, scratch resistant polyester.
The combination of flexible but strong material and the layered design ensures
that the sealing provides protection against normal wear and tear. The same resilient
material is used for the holder on which the diamond itself rests. This diamond
holder is constructed in such a way, that the culet is safely held without touching
the bottom card, thereby providing maximum protection against damage. The advantage
of this transparent and colourless diamond holder is that the diamond seems to
float in the window, so that brilliance and fire are not diminished.
sealing can be opened without any instruments or even scissors: it suffices to
peel off the back layer. Once it has been opened, however, it cannot be resealed.
Even if one tried to glue the parts together again, the fractured red bars and
the cryptoprint text cannot be undone.