SSEF is a highly respected lab where natural pearls are concerned. Dr. Laurent E. Cartier, world-renowned pearl researcher, was almost certainly involved in examining these pearls. You can contact him and ask:
gemlab@ssef.ch - or on the sustainable pearls website. I agree that the description is wacky, but I wouldn't jump to conclusions.
Agreed Blaire. Having not read the report, I cannot speak to it's content any further than discussing third party quotes as presented. Pattye, please address these concerns to Dr. Cartier, that he may respond.
Any report from a gem lab may be objectively challenged on a few points. The first and most obvious being, there are no constants applied across the board. Constants apply in some cases, but not others. Bead nuclei for example, is a constant of one cultural method, but never natural origin. In the absence of beads, mantle tissue grafts present with uniform contrasts at the nuclei among multiple samples,
always aseptic periostracial > prismatic > nacreous > calcareous progressions, indicating cultural origin. Incidentally, I have suspicions, some farmers don't graft with mantles, but other tissues. However, even in those cases, the contrasts in the views would tend to be uniform across the board. Conversely, natural pearls have multiple factors for onset, hence uniformity is inconsistent, if not wholly irregular. Naturals are borne of
septic or aseptic lesions from either
myostracial or periostracial origin.
Three completely different pathways not observed in pearls of cultural origin. These determinations are unavailable to the analyst when pearls are drilled, hence the greater part of conclusive evidence is lost.
To determine a pearl strand as natural, I would expect a combination of all four of the latter described groups. The rarity of every pearl being of the same group is mathematically improbable.
I've said it before and I'll say it again. When it comes to pearls, one can never dismiss the importance of provenance. Unless one is absolutely certain with species, region, harvester and legality the rest is little more than conjecture.