Cabernet is among the most ubiquitous of grapes, given its fame from Bordeaux. But it is a noble grape, and there are noble environments outside of Bordeaux that nurture it to greatness and individuality. But the great sea of Cabernet Sauvignon in the world is mediocre at best, for sure, given the commercial motivation behind its use, irrigation techniques, and other sustainability issues in common with pearl farming.
My term for the concept would be nobility: Accepting that P. Margaritifera and P. Maxima (among the others) are noble shells, then we must look for noble environments, noble farmers, and finally noble marketers able to communicate the totality of the message. This comes under the heading of 'individual farm branding' mentioned above, as certainly a far more efficient approach than waiting for the Cook Islands authorities to get their act together!