| Process of creation |
| A
natural
pearl is a product of pure chance and is only produced, if a foreign substance
(a parasite or dead tissue or even a grain of sand) is encysted by the
oyster to neutralize it.
The foreign substance must also drag along a piece of epithelial tissue, because only under these circumstances the tissue begins to grow and encapsulates the foreign substance in a cyst.  The foreign substance may be a parasite or a grain of sand, the oyster wants to neutralize or a nucleus of shell, made by man to make the oyster produce a pearl. |
The
function of the epithelial tissue (and the cyst) is to to produce
nacre. The foreign substance is therefore covered by layers of nacre (conchiolin
and calzium-carbonate). The layers have a thickness of only 0.010
- 0.015 mm.
|
