Celebes-North Borneo region pearls
Celebes-North Borneo region pearls
All,
In Celebes and North Borneo, there is a type of oyster which yields natural, irregular pearls of this color. The shell most closely resemblesPterias penguin oyster, with its characteristic spear-like wing. The lustrous pearls are definitely not all mabe, as suggested in several reference books.
The pearl in question may be Fresh Water, like those mentioned that were put up for sale on ebay, but may be Pterias.
Tom Stern,MD