Well, I decided to get my brother's opinion on the Tahitian/leather necklace, as he is somewhat less conservative and more fashion-conscious than I am. He was kind of neutral about it, feeling that, as presented in the pictures he saw, it seemed somewhat casual rather than dressy. His idea, which I certainly would not have come up with, was to have Tahitians mounted as decoration on a watch in such a way that they would be visible both from above and from below. I objected that it would take a very chunky watch to support such a setting, but he pointed out that there are some very chunky watches out there. For instance: http://oakley.com/o/c501t
Now those are substantial timepieces. I can almost see Tahitians mounted at the corners of the "Time Tank."

While thinking about this subject, it occured to me that, although I probably wouldn't wear a Tahitian/leather necklace, I would wear a bracelet equivalent. Basically, take the necklace and make the strap much shorter, keeping just the single Tahitian, and you've got a bracelet. Yup, that's something I would wear.